diff --git a/clickhouse-i114640-a/benchmark.sh b/clickhouse-i114640-a/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-a/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-a/check b/clickhouse-i114640-a/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-a/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-a/create.sql b/clickhouse-i114640-a/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-a/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-a/data-size b/clickhouse-i114640-a/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-a/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-a/install b/clickhouse-i114640-a/install
new file mode 100755
index 0000000000..b65e6ab25f
--- /dev/null
+++ b/clickhouse-i114640-a/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned release build for the A/B investigation of
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# v26.5.6.113 anchor (last minor before the suspect window; expected fast on Q10/Q11).
+VERSION=26.5.6.113
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o ch.tgz \
+        "https://github.com/ClickHouse/ClickHouse/releases/download/v${VERSION}-stable/clickhouse-common-static-${VERSION}-amd64.tgz"
+    tar -xzf ch.tgz
+    sudo "./clickhouse-common-static-${VERSION}/usr/bin/clickhouse" install --noninteractive
+    rm -rf ch.tgz "clickhouse-common-static-${VERSION}"
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-a/load b/clickhouse-i114640-a/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-a/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-a/queries.sql b/clickhouse-i114640-a/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-a/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-a/query b/clickhouse-i114640-a/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-a/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-a/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-a/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..48c7d7deae
--- /dev/null
+++ b/clickhouse-i114640-a/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 26.5.6.113)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 254,
+      "data_size": 15268657418,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.001, 0.001],
+        [0.121, 0.01, 0.01],
+        [0.417, 0.027, 0.012],
+        [0.919, 0.012, 0.012],
+        [1.003, 0.075, 0.063],
+        [1.848, 0.102, 0.082],
+        [0.143, 0.009, 0.01],
+        [0.146, 0.016, 0.045],
+        [1.612, 0.288, 0.226],
+        [1.919, 0.264, 0.298],
+        [1.215, 0.13, 0.113],
+        [1.318, 0.097, 0.11],
+        [1.815, 0.136, 0.115],
+        [2.703, 0.142, 0.121],
+        [1.994, 0.086, 0.076],
+        [0.976, 0.075, 0.06],
+        [2.626, 0.15, 0.147],
+        [2.631, 0.137, 0.116],
+        [4.049, 0.272, 0.268],
+        [0.707, 0.002, 0.003],
+        [9.464, 0.052, 0.054],
+        [10.968, 0.04, 0.039],
+        [13.838, 0.089, 0.084],
+        [5.269, 0.088, 0.073],
+        [1.911, 0.198, 0.08],
+        [1.762, 0.033, 0.03],
+        [1.929, 0.67, 0.058],
+        [1.162, 0.044, 0.088],
+        [8.254, 0.766, 0.752],
+        [0.501, 0.121, 0.065],
+        [1.635, 0.084, 0.064],
+        [3.92, 0.09, 0.095],
+        [3.918, 0.444, 0.364],
+        [10.579, 0.371, 0.305],
+        [9.718, 0.363, 0.311],
+        [0.741, 0.06, 0.043],
+        [0.733, 0.054, 0.06],
+        [0.411, 0.047, 0.044],
+        [0.778, 0.046, 0.026],
+        [1.232, 0.114, 0.1],
+        [0.425, 0.028, 0.037],
+        [0.356, 0.026, 0.012],
+        [0.259, 0.021, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-a/start b/clickhouse-i114640-a/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-a/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-a/stop b/clickhouse-i114640-a/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-a/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-a/template.json b/clickhouse-i114640-a/template.json
new file mode 100644
index 0000000000..d77d75b4d0
--- /dev/null
+++ b/clickhouse-i114640-a/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 26.5.6.113)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-daily/benchmark.sh b/clickhouse-i114640-daily/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-daily/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-daily/check b/clickhouse-i114640-daily/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-daily/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-daily/create.sql b/clickhouse-i114640-daily/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-daily/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-daily/data-size b/clickhouse-i114640-daily/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-daily/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-daily/install b/clickhouse-i114640-daily/install
new file mode 100755
index 0000000000..46fa3da1f5
--- /dev/null
+++ b/clickhouse-i114640-daily/install
@@ -0,0 +1,38 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 3 CONTROL for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# the EXACT install the daily mainline runs use (universal script = current
+# master CDN artifact). Expected to reproduce the Q11 slow mode.
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 60 --retry-all-errors https://clickhouse.com/ | sh
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-daily/load b/clickhouse-i114640-daily/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-daily/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-daily/queries.sql b/clickhouse-i114640-daily/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-daily/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-daily/query b/clickhouse-i114640-daily/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-daily/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-daily/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-daily/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..52a53943f5
--- /dev/null
+++ b/clickhouse-i114640-daily/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 daily-master CDN)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 259,
+      "data_size": 15266678705,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.002, 0.001],
+        [0.002, 0.002, 0.002],
+        [0.414, 0.022, 0.014],
+        [0.986, 0.027, 0.024],
+        [1.039, 0.07, 0.078],
+        [1.991, 0.078, 0.098],
+        [0.106, 0.01, 0.01],
+        [0.138, 0.016, 0.018],
+        [1.664, 0.225, 0.22],
+        [1.888, 0.26, 0.224],
+        [1.419, 0.187, 0.213],
+        [1.599, 0.193, 0.222],
+        [1.859, 0.074, 0.071],
+        [2.838, 0.116, 0.098],
+        [2.082, 0.085, 0.081],
+        [0.998, 0.067, 0.057],
+        [2.826, 0.148, 0.148],
+        [2.713, 0.154, 0.131],
+        [4.219, 0.267, 0.281],
+        [0.951, 0.003, 0.003],
+        [9.529, 0.057, 0.047],
+        [11.013, 0.023, 0.023],
+        [13.815, 0.064, 0.059],
+        [5.694, 0.287, 0.261],
+        [1.999, 0.197, 0.178],
+        [1.809, 0.033, 0.035],
+        [1.899, 0.881, 0.165],
+        [1.215, 0.032, 0.024],
+        [8.559, 0.195, 0.189],
+        [0.469, 0.037, 0.036],
+        [1.624, 0.067, 0.059],
+        [3.84, 0.11, 0.068],
+        [3.873, 0.364, 0.36],
+        [10.018, 0.31, 0.299],
+        [9.821, 0.308, 0.282],
+        [0.682, 0.055, 0.048],
+        [0.925, 0.047, 0.047],
+        [0.459, 0.025, 0.021],
+        [0.928, 0.02, 0.021],
+        [1.517, 0.118, 0.101],
+        [0.542, 0.014, 0.014],
+        [0.507, 0.027, 0.01],
+        [0.344, 0.021, 0.007]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-daily/start b/clickhouse-i114640-daily/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-daily/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-daily/stop b/clickhouse-i114640-daily/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-daily/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-daily/template.json b/clickhouse-i114640-daily/template.json
new file mode 100644
index 0000000000..07a9c6d3cb
--- /dev/null
+++ b/clickhouse-i114640-daily/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 daily-master CDN)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-fix/benchmark.sh b/clickhouse-i114640-fix/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-fix/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-fix/check b/clickhouse-i114640-fix/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-fix/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-fix/create.sql b/clickhouse-i114640-fix/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-fix/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-fix/data-size b/clickhouse-i114640-fix/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-fix/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-fix/install b/clickhouse-i114640-fix/install
new file mode 100755
index 0000000000..f9a5e647b4
--- /dev/null
+++ b/clickhouse-i114640-fix/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Validation round for https://github.com/ClickHouse/ClickHouse/pull/114691:
+# the CI build of the fix (parallelize single->two-level conversion in
+# Aggregator::prepareVariantsToMerge). Expected: Q10/Q11 back to ~0.09-0.13
+# on c7a.metal-48xl while current master dailies show 0.16-0.39.
+SHA=2a9e54c7201e63b269eaba0f3fd2ec9d3558109a
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/PRs/114691/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-fix/load b/clickhouse-i114640-fix/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-fix/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-fix/queries.sql b/clickhouse-i114640-fix/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-fix/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-fix/query b/clickhouse-i114640-fix/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-fix/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-fix/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-fix/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..a7e7eff19e
--- /dev/null
+++ b/clickhouse-i114640-fix/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 fix PR 114691)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 274,
+      "data_size": 15259162182,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.001, 0.001, 0.001],
+        [0.373, 0.013, 0.013],
+        [0.957, 0.012, 0.012],
+        [1.121, 0.066, 0.065],
+        [1.888, 0.08, 0.074],
+        [0.103, 0.01, 0.01],
+        [0.152, 0.019, 0.016],
+        [1.629, 0.245, 0.249],
+        [1.897, 0.233, 0.222],
+        [1.299, 0.105, 0.096],
+        [1.333, 0.124, 0.097],
+        [1.872, 0.083, 0.067],
+        [2.759, 0.109, 0.098],
+        [2.09, 0.088, 0.076],
+        [1.022, 0.065, 0.065],
+        [2.741, 0.147, 0.142],
+        [2.822, 0.125, 0.119],
+        [4.39, 0.265, 0.26],
+        [0.66, 0.003, 0.002],
+        [9.568, 0.061, 0.051],
+        [11.08, 0.024, 0.024],
+        [13.783, 0.061, 0.063],
+        [4.225, 0.379, 0.383],
+        [2.12, 0.193, 0.102],
+        [1.898, 0.035, 0.032],
+        [2.001, 0.748, 0.161],
+        [1.217, 0.031, 0.024],
+        [8.722, 0.202, 0.194],
+        [0.431, 0.037, 0.036],
+        [1.607, 0.074, 0.078],
+        [3.86, 0.094, 0.074],
+        [3.864, 0.353, 0.358],
+        [10.043, 0.314, 0.275],
+        [9.766, 0.308, 0.278],
+        [0.709, 0.064, 0.044],
+        [0.581, 0.066, 0.021],
+        [0.386, 0.033, 0.013],
+        [0.644, 0.032, 0.013],
+        [0.929, 0.046, 0.044],
+        [0.366, 0.025, 0.01],
+        [0.354, 0.027, 0.008],
+        [0.258, 0.025, 0.008]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-fix/start b/clickhouse-i114640-fix/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-fix/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-fix/stop b/clickhouse-i114640-fix/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-fix/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-fix/template.json b/clickhouse-i114640-fix/template.json
new file mode 100644
index 0000000000..99d00e5dde
--- /dev/null
+++ b/clickhouse-i114640-fix/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 fix PR 114691)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-m0618/benchmark.sh b/clickhouse-i114640-m0618/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-m0618/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-m0618/check b/clickhouse-i114640-m0618/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-m0618/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-m0618/create.sql b/clickhouse-i114640-m0618/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-m0618/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-m0618/data-size b/clickhouse-i114640-m0618/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-m0618/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-m0618/install b/clickhouse-i114640-m0618/install
new file mode 100755
index 0000000000..38d6f37d76
--- /dev/null
+++ b/clickhouse-i114640-m0618/install
@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build, round 2 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# master @ 2026-06-18 (inside the 06-13..06-23 window).
+SHA=0ea5338b83a06aada8cc39853386f300aee066da
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-m0618/load b/clickhouse-i114640-m0618/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-m0618/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-m0618/queries.sql b/clickhouse-i114640-m0618/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-m0618/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-m0618/query b/clickhouse-i114640-m0618/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-m0618/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-m0618/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-m0618/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..9b92d90b65
--- /dev/null
+++ b/clickhouse-i114640-m0618/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master 06-18)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 262,
+      "data_size": 15270275447,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.107, 0.042, 0.011],
+        [0.424, 0.013, 0.013],
+        [0.92, 0.014, 0.013],
+        [1.011, 0.074, 0.065],
+        [1.832, 0.097, 0.103],
+        [0.142, 0.01, 0.01],
+        [0.126, 0.026, 0.047],
+        [1.584, 0.245, 0.242],
+        [1.922, 0.253, 0.255],
+        [1.233, 0.134, 0.127],
+        [1.416, 0.098, 0.085],
+        [1.865, 0.096, 0.096],
+        [2.69, 0.124, 0.124],
+        [2.073, 0.082, 0.079],
+        [1.005, 0.074, 0.076],
+        [2.765, 0.147, 0.146],
+        [2.696, 0.149, 0.123],
+        [4.064, 0.264, 0.271],
+        [0.724, 0.003, 0.003],
+        [9.548, 0.049, 0.045],
+        [11.093, 0.037, 0.033],
+        [13.913, 0.088, 0.08],
+        [5.438, 0.079, 0.08],
+        [1.992, 0.064, 0.093],
+        [1.746, 0.037, 0.068],
+        [2.022, 0.727, 0.045],
+        [1.191, 0.04, 0.063],
+        [8.504, 0.841, 0.838],
+        [0.402, 0.054, 0.046],
+        [1.589, 0.07, 0.063],
+        [4.123, 0.087, 0.072],
+        [3.86, 0.377, 0.348],
+        [9.99, 0.344, 0.346],
+        [9.808, 0.337, 0.332],
+        [0.751, 0.056, 0.051],
+        [0.804, 0.096, 0.088],
+        [0.433, 0.069, 0.04],
+        [0.717, 0.045, 0.027],
+        [1.17, 0.14, 0.173],
+        [0.451, 0.034, 0.017],
+        [0.361, 0.03, 0.013],
+        [0.257, 0.024, 0.009]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-m0618/start b/clickhouse-i114640-m0618/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-m0618/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-m0618/stop b/clickhouse-i114640-m0618/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-m0618/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-m0618/template.json b/clickhouse-i114640-m0618/template.json
new file mode 100644
index 0000000000..77929ea8df
--- /dev/null
+++ b/clickhouse-i114640-m0618/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master 06-18)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-m0622/benchmark.sh b/clickhouse-i114640-m0622/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-m0622/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-m0622/check b/clickhouse-i114640-m0622/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-m0622/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-m0622/create.sql b/clickhouse-i114640-m0622/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-m0622/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-m0622/data-size b/clickhouse-i114640-m0622/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-m0622/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-m0622/install b/clickhouse-i114640-m0622/install
new file mode 100755
index 0000000000..b44fa337cf
--- /dev/null
+++ b/clickhouse-i114640-m0622/install
@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build, round 2 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# master @ 2026-06-22 (just before the 26.6 branch point).
+SHA=7ef85344d14af52e564f177db2957d43aebaaa5c
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-m0622/load b/clickhouse-i114640-m0622/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-m0622/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-m0622/queries.sql b/clickhouse-i114640-m0622/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-m0622/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-m0622/query b/clickhouse-i114640-m0622/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-m0622/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-m0622/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-m0622/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..ea2518728e
--- /dev/null
+++ b/clickhouse-i114640-m0622/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master 06-22)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 242,
+      "data_size": 15267833461,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.002, 0.001],
+        [0.146, 0.076, 0.011],
+        [0.376, 0.015, 0.013],
+        [0.971, 0.012, 0.011],
+        [1.011, 0.069, 0.075],
+        [1.836, 0.104, 0.092],
+        [0.142, 0.01, 0.01],
+        [0.139, 0.018, 0.018],
+        [1.592, 0.256, 0.248],
+        [1.881, 0.264, 0.287],
+        [1.215, 0.143, 0.145],
+        [1.374, 0.109, 0.096],
+        [1.946, 0.099, 0.123],
+        [2.755, 0.139, 0.138],
+        [2.093, 0.086, 0.085],
+        [0.976, 0.068, 0.074],
+        [2.847, 0.163, 0.165],
+        [2.848, 0.149, 0.128],
+        [4.14, 0.295, 0.265],
+        [0.647, 0.002, 0.002],
+        [9.573, 0.06, 0.051],
+        [11.009, 0.037, 0.034],
+        [14.032, 0.089, 0.081],
+        [4.954, 0.075, 0.072],
+        [1.971, 0.057, 0.059],
+        [1.827, 0.041, 0.034],
+        [1.917, 0.599, 0.059],
+        [1.16, 0.041, 0.042],
+        [8.204, 0.781, 0.778],
+        [0.391, 0.046, 0.046],
+        [1.555, 0.074, 0.084],
+        [3.83, 0.084, 0.075],
+        [3.828, 0.36, 0.355],
+        [9.833, 0.343, 0.375],
+        [9.739, 0.323, 0.327],
+        [0.693, 0.06, 0.063],
+        [0.762, 0.086, 0.081],
+        [0.403, 0.055, 0.039],
+        [0.831, 0.023, 0.023],
+        [1.242, 0.171, 0.15],
+        [0.417, 0.019, 0.028],
+        [0.537, 0.03, 0.013],
+        [0.281, 0.028, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-m0622/start b/clickhouse-i114640-m0622/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-m0622/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-m0622/stop b/clickhouse-i114640-m0622/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-m0622/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-m0622/template.json b/clickhouse-i114640-m0622/template.json
new file mode 100644
index 0000000000..34e60bf035
--- /dev/null
+++ b/clickhouse-i114640-m0622/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master 06-22)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-m0629/benchmark.sh b/clickhouse-i114640-m0629/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-m0629/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-m0629/check b/clickhouse-i114640-m0629/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-m0629/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-m0629/create.sql b/clickhouse-i114640-m0629/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-m0629/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-m0629/data-size b/clickhouse-i114640-m0629/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-m0629/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-m0629/install b/clickhouse-i114640-m0629/install
new file mode 100755
index 0000000000..e3e5cb413f
--- /dev/null
+++ b/clickhouse-i114640-m0629/install
@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build, round 3 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640.
+# The universal install script serves DAILY MASTER builds, so the real
+# regression window is master 2026-06-23..07-18 (not 26.5..26.6).
+# master @ 2026-06-29.
+SHA=68024785a7050cd1af475c116d0a59f857887b35
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-m0629/load b/clickhouse-i114640-m0629/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-m0629/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-m0629/queries.sql b/clickhouse-i114640-m0629/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-m0629/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-m0629/query b/clickhouse-i114640-m0629/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-m0629/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-m0629/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-m0629/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..42ec53e5a7
--- /dev/null
+++ b/clickhouse-i114640-m0629/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master 06-29)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 248,
+      "data_size": 15270557591,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.001, 0.001],
+        [0.157, 0.014, 0.011],
+        [0.423, 0.014, 0.024],
+        [0.898, 0.012, 0.012],
+        [1.025, 0.067, 0.061],
+        [1.923, 0.101, 0.098],
+        [0.13, 0.01, 0.01],
+        [0.164, 0.017, 0.028],
+        [1.638, 0.246, 0.232],
+        [1.922, 0.243, 0.239],
+        [1.261, 0.121, 0.119],
+        [1.387, 0.11, 0.092],
+        [1.95, 0.12, 0.119],
+        [2.803, 0.141, 0.138],
+        [2.102, 0.088, 0.079],
+        [1.056, 0.069, 0.057],
+        [2.727, 0.158, 0.162],
+        [2.722, 0.139, 0.138],
+        [4.117, 0.314, 0.275],
+        [0.669, 0.002, 0.002],
+        [9.497, 0.052, 0.044],
+        [10.979, 0.037, 0.034],
+        [13.894, 0.086, 0.078],
+        [4.92, 0.078, 0.074],
+        [1.925, 0.084, 0.047],
+        [1.797, 0.037, 0.033],
+        [1.987, 0.65, 0.046],
+        [1.187, 0.038, 0.037],
+        [8.199, 0.702, 0.702],
+        [0.443, 0.063, 0.046],
+        [1.633, 0.078, 0.066],
+        [4.096, 0.086, 0.073],
+        [3.942, 0.462, 0.363],
+        [9.787, 0.371, 0.343],
+        [9.87, 0.339, 0.322],
+        [0.667, 0.062, 0.06],
+        [0.794, 0.054, 0.05],
+        [0.442, 0.042, 0.041],
+        [0.784, 0.038, 0.023],
+        [1.271, 0.122, 0.101],
+        [0.406, 0.032, 0.018],
+        [0.506, 0.03, 0.012],
+        [0.409, 0.01, 0.009]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-m0629/start b/clickhouse-i114640-m0629/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-m0629/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-m0629/stop b/clickhouse-i114640-m0629/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-m0629/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-m0629/template.json b/clickhouse-i114640-m0629/template.json
new file mode 100644
index 0000000000..0e78bc3660
--- /dev/null
+++ b/clickhouse-i114640-m0629/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master 06-29)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-m0711/benchmark.sh b/clickhouse-i114640-m0711/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-m0711/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-m0711/check b/clickhouse-i114640-m0711/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-m0711/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-m0711/create.sql b/clickhouse-i114640-m0711/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-m0711/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-m0711/data-size b/clickhouse-i114640-m0711/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-m0711/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-m0711/install b/clickhouse-i114640-m0711/install
new file mode 100755
index 0000000000..02f2ff9dec
--- /dev/null
+++ b/clickhouse-i114640-m0711/install
@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build, round 3 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640.
+# The universal install script serves DAILY MASTER builds, so the real
+# regression window is master 2026-06-23..07-18 (not 26.5..26.6).
+# master @ 2026-07-11 (the 26.7 branch point).
+SHA=ab8535b3ab0f127a359ba889d9bd26b9456f1897
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-m0711/load b/clickhouse-i114640-m0711/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-m0711/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-m0711/queries.sql b/clickhouse-i114640-m0711/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-m0711/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-m0711/query b/clickhouse-i114640-m0711/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-m0711/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-m0711/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-m0711/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..1a9784effd
--- /dev/null
+++ b/clickhouse-i114640-m0711/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master 07-11)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 254,
+      "data_size": 15262292557,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.117, 0.011, 0.011],
+        [0.379, 0.014, 0.035],
+        [0.96, 0.013, 0.023],
+        [1.063, 0.069, 0.064],
+        [1.947, 0.109, 0.111],
+        [0.167, 0.01, 0.01],
+        [0.131, 0.017, 0.031],
+        [1.578, 0.244, 0.246],
+        [1.955, 0.246, 0.24],
+        [1.875, 0.475, 0.391],
+        [1.598, 0.213, 0.242],
+        [1.962, 0.104, 0.111],
+        [2.897, 0.135, 0.134],
+        [2.068, 0.086, 0.078],
+        [1.043, 0.067, 0.062],
+        [2.703, 0.159, 0.155],
+        [2.8, 0.142, 0.119],
+        [4.264, 0.264, 0.273],
+        [0.689, 0.003, 0.002],
+        [9.484, 0.053, 0.048],
+        [10.964, 0.021, 0.021],
+        [13.822, 0.081, 0.062],
+        [4.742, 0.108, 0.071],
+        [1.857, 0.172, 0.15],
+        [1.815, 0.036, 0.031],
+        [1.919, 0.5, 0.139],
+        [1.174, 0.026, 0.058],
+        [8.767, 0.227, 0.223],
+        [0.393, 0.039, 0.039],
+        [1.697, 0.068, 0.059],
+        [3.816, 0.089, 0.085],
+        [3.925, 0.366, 0.35],
+        [10.003, 0.343, 0.329],
+        [9.833, 0.381, 0.366],
+        [0.712, 0.059, 0.051],
+        [0.725, 0.071, 0.09],
+        [0.421, 0.041, 0.045],
+        [0.736, 0.026, 0.021],
+        [1.24, 0.155, 0.145],
+        [0.394, 0.016, 0.016],
+        [0.388, 0.026, 0.013],
+        [0.274, 0.023, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-m0711/start b/clickhouse-i114640-m0711/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-m0711/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-m0711/stop b/clickhouse-i114640-m0711/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-m0711/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-m0711/template.json b/clickhouse-i114640-m0711/template.json
new file mode 100644
index 0000000000..0c6bbdd0e1
--- /dev/null
+++ b/clickhouse-i114640-m0711/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master 07-11)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-m0718/benchmark.sh b/clickhouse-i114640-m0718/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-m0718/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-m0718/check b/clickhouse-i114640-m0718/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-m0718/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-m0718/create.sql b/clickhouse-i114640-m0718/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-m0718/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-m0718/data-size b/clickhouse-i114640-m0718/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-m0718/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-m0718/install b/clickhouse-i114640-m0718/install
new file mode 100755
index 0000000000..32523acc5d
--- /dev/null
+++ b/clickhouse-i114640-m0718/install
@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build, round 3 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640.
+# The universal install script serves DAILY MASTER builds, so the real
+# regression window is master 2026-06-23..07-18 (not 26.5..26.6).
+# master @ 2026-07-18 (eve of the first slow daily run).
+SHA=9d197f142d0ffdbea12c44349b657814cd2a00e2
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-m0718/load b/clickhouse-i114640-m0718/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-m0718/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-m0718/queries.sql b/clickhouse-i114640-m0718/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-m0718/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-m0718/query b/clickhouse-i114640-m0718/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-m0718/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-m0718/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-m0718/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..57b8de4ee1
--- /dev/null
+++ b/clickhouse-i114640-m0718/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master 07-18)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 243,
+      "data_size": 15267851084,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.002, 0.001],
+        [0.12, 0.056, 0.01],
+        [0.417, 0.014, 0.012],
+        [0.911, 0.011, 0.026],
+        [1.03, 0.069, 0.068],
+        [1.857, 0.093, 0.084],
+        [0.123, 0.01, 0.023],
+        [0.145, 0.027, 0.051],
+        [1.566, 0.232, 0.236],
+        [1.868, 0.233, 0.258],
+        [1.712, 0.294, 0.399],
+        [1.541, 0.211, 0.263],
+        [1.895, 0.1, 0.11],
+        [2.747, 0.131, 0.124],
+        [2.082, 0.082, 0.081],
+        [1.001, 0.067, 0.066],
+        [2.65, 0.153, 0.155],
+        [2.774, 0.15, 0.12],
+        [4.075, 0.29, 0.275],
+        [0.673, 0.003, 0.002],
+        [9.52, 0.051, 0.048],
+        [10.95, 0.024, 0.022],
+        [13.796, 0.1, 0.063],
+        [5.025, 0.3, 0.276],
+        [2.071, 0.175, 0.154],
+        [1.738, 0.038, 0.038],
+        [2.024, 0.729, 0.146],
+        [1.174, 0.03, 0.032],
+        [8.472, 0.234, 0.227],
+        [0.408, 0.037, 0.037],
+        [1.586, 0.081, 0.069],
+        [3.881, 0.167, 0.075],
+        [3.849, 0.369, 0.355],
+        [9.782, 0.353, 0.326],
+        [9.802, 0.333, 0.345],
+        [0.749, 0.055, 0.055],
+        [0.729, 0.066, 0.087],
+        [0.42, 0.044, 0.043],
+        [0.722, 0.026, 0.024],
+        [1.179, 0.162, 0.137],
+        [0.476, 0.017, 0.015],
+        [0.358, 0.024, 0.012],
+        [0.381, 0.027, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-m0718/start b/clickhouse-i114640-m0718/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-m0718/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-m0718/stop b/clickhouse-i114640-m0718/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-m0718/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-m0718/template.json b/clickhouse-i114640-m0718/template.json
new file mode 100644
index 0000000000..7236be21f2
--- /dev/null
+++ b/clickhouse-i114640-m0718/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master 07-18)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-post/benchmark.sh b/clickhouse-i114640-post/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-post/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-post/check b/clickhouse-i114640-post/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-post/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-post/create.sql b/clickhouse-i114640-post/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-post/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-post/data-size b/clickhouse-i114640-post/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-post/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-post/install b/clickhouse-i114640-post/install
new file mode 100755
index 0000000000..d5b878de71
--- /dev/null
+++ b/clickhouse-i114640-post/install
@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build for the A/B investigation of
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# master merge commit OF the ThreadPool LIFO scheduling change (#100177).
+SHA=e78a4dac750cb4e71fb1928c6e3d760817d45e78
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-post/load b/clickhouse-i114640-post/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-post/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-post/queries.sql b/clickhouse-i114640-post/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-post/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-post/query b/clickhouse-i114640-post/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-post/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-post/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-post/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..e859c28f23
--- /dev/null
+++ b/clickhouse-i114640-post/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master post-LIFO)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 238,
+      "data_size": 15272403371,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.002, 0.002],
+        [0.135, 0.011, 0.012],
+        [0.405, 0.013, 0.013],
+        [0.926, 0.014, 0.013],
+        [1.006, 0.068, 0.088],
+        [1.887, 0.097, 0.093],
+        [0.126, 0.01, 0.025],
+        [0.138, 0.025, 0.03],
+        [1.55, 0.287, 0.29],
+        [1.992, 0.244, 0.343],
+        [1.236, 0.132, 0.13],
+        [1.334, 0.138, 0.093],
+        [1.891, 0.115, 0.094],
+        [2.8, 0.127, 0.13],
+        [2.082, 0.083, 0.081],
+        [1.011, 0.068, 0.059],
+        [2.791, 0.156, 0.154],
+        [2.649, 0.126, 0.132],
+        [4.095, 0.295, 0.262],
+        [0.692, 0.003, 0.003],
+        [9.56, 0.054, 0.046],
+        [11.099, 0.038, 0.034],
+        [13.979, 0.099, 0.082],
+        [4.782, 0.076, 0.072],
+        [1.957, 0.078, 0.043],
+        [1.804, 0.036, 0.027],
+        [1.866, 0.712, 0.055],
+        [1.194, 0.045, 0.042],
+        [8.093, 0.745, 0.733],
+        [0.458, 0.047, 0.046],
+        [1.642, 0.072, 0.066],
+        [3.982, 0.081, 0.081],
+        [4.086, 0.357, 0.352],
+        [9.807, 0.332, 0.313],
+        [9.769, 0.327, 0.316],
+        [0.711, 0.057, 0.058],
+        [0.705, 0.088, 0.065],
+        [0.36, 0.042, 0.065],
+        [0.769, 0.026, 0.026],
+        [1.259, 0.144, 0.138],
+        [0.397, 0.028, 0.018],
+        [0.332, 0.034, 0.012],
+        [0.272, 0.021, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-post/start b/clickhouse-i114640-post/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-post/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-post/stop b/clickhouse-i114640-post/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-post/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-post/template.json b/clickhouse-i114640-post/template.json
new file mode 100644
index 0000000000..af2c4d0908
--- /dev/null
+++ b/clickhouse-i114640-post/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master post-LIFO)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-pre/benchmark.sh b/clickhouse-i114640-pre/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-pre/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-pre/check b/clickhouse-i114640-pre/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-pre/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-pre/create.sql b/clickhouse-i114640-pre/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-pre/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-pre/data-size b/clickhouse-i114640-pre/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-pre/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-pre/install b/clickhouse-i114640-pre/install
new file mode 100755
index 0000000000..257a3fef1e
--- /dev/null
+++ b/clickhouse-i114640-pre/install
@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned CI master build for the A/B investigation of
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# master commit right BEFORE the ThreadPool LIFO scheduling change (#100177).
+SHA=5719dd022fc457e1ed5f2e7983708e57ed81d6dd
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-pre/load b/clickhouse-i114640-pre/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-pre/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-pre/queries.sql b/clickhouse-i114640-pre/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-pre/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-pre/query b/clickhouse-i114640-pre/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-pre/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-pre/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-pre/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..527d981e12
--- /dev/null
+++ b/clickhouse-i114640-pre/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 master pre-LIFO)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 257,
+      "data_size": 15264899217,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.001, 0.001],
+        [0.118, 0.011, 0.011],
+        [0.397, 0.019, 0.013],
+        [0.928, 0.012, 0.012],
+        [1.018, 0.08, 0.055],
+        [1.897, 0.119, 0.14],
+        [0.112, 0.011, 0.01],
+        [0.206, 0.019, 0.018],
+        [1.617, 0.23, 0.233],
+        [1.875, 0.242, 0.264],
+        [1.256, 0.18, 0.191],
+        [1.424, 0.11, 0.099],
+        [1.936, 0.122, 0.124],
+        [2.684, 0.186, 0.224],
+        [1.965, 0.081, 0.095],
+        [1, 0.083, 0.117],
+        [2.758, 0.162, 0.183],
+        [2.654, 0.151, 0.171],
+        [4.124, 0.277, 0.298],
+        [0.685, 0.002, 0.002],
+        [9.493, 0.086, 0.086],
+        [11.026, 0.243, 0.04],
+        [13.856, 0.204, 0.177],
+        [4.697, 0.08, 0.078],
+        [2.048, 0.097, 0.042],
+        [1.839, 0.038, 0.032],
+        [1.998, 0.82, 0.047],
+        [1.208, 0.051, 0.052],
+        [8.075, 0.762, 0.832],
+        [0.516, 0.047, 0.052],
+        [1.558, 0.084, 0.086],
+        [3.965, 0.085, 0.083],
+        [3.952, 0.498, 0.363],
+        [9.819, 0.349, 0.401],
+        [9.812, 0.395, 0.417],
+        [0.706, 0.061, 0.069],
+        [0.659, 0.087, 0.082],
+        [0.353, 0.051, 0.049],
+        [0.619, 0.036, 0.023],
+        [0.997, 0.131, 0.124],
+        [0.364, 0.025, 0.018],
+        [0.316, 0.025, 0.026],
+        [0.238, 0.035, 0.009]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-pre/start b/clickhouse-i114640-pre/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-pre/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-pre/stop b/clickhouse-i114640-pre/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-pre/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-pre/template.json b/clickhouse-i114640-pre/template.json
new file mode 100644
index 0000000000..901cbb2305
--- /dev/null
+++ b/clickhouse-i114640-pre/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 master pre-LIFO)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-v2661/benchmark.sh b/clickhouse-i114640-v2661/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-v2661/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-v2661/check b/clickhouse-i114640-v2661/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-v2661/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-v2661/create.sql b/clickhouse-i114640-v2661/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-v2661/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-v2661/data-size b/clickhouse-i114640-v2661/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-v2661/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-v2661/install b/clickhouse-i114640-v2661/install
new file mode 100755
index 0000000000..3ac59d2e3e
--- /dev/null
+++ b/clickhouse-i114640-v2661/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Pinned release build, round 2 of the A/B for
+# https://github.com/ClickHouse/ClickHouse/issues/114640:
+# official 26.6.1.1193 (first release with the daily-run Q11 slow mode; expected SLOW).
+VERSION=26.6.1.1193
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o ch.tgz \
+        "https://github.com/ClickHouse/ClickHouse/releases/download/v${VERSION}-stable/clickhouse-common-static-${VERSION}-amd64.tgz"
+    tar -xzf ch.tgz
+    sudo "./clickhouse-common-static-${VERSION}/usr/bin/clickhouse" install --noninteractive
+    rm -rf ch.tgz "clickhouse-common-static-${VERSION}"
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-v2661/load b/clickhouse-i114640-v2661/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-v2661/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-v2661/queries.sql b/clickhouse-i114640-v2661/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-v2661/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-v2661/query b/clickhouse-i114640-v2661/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-v2661/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-v2661/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-v2661/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..34b828ee3b
--- /dev/null
+++ b/clickhouse-i114640-v2661/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 26.6.1.1193)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 231,
+      "data_size": 15264807372,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.002],
+        [0.131, 0.012, 0.012],
+        [0.372, 0.013, 0.013],
+        [0.925, 0.025, 0.011],
+        [1.01, 0.078, 0.064],
+        [1.939, 0.094, 0.107],
+        [0.108, 0.01, 0.01],
+        [0.129, 0.018, 0.018],
+        [1.675, 0.235, 0.281],
+        [1.999, 0.243, 0.255],
+        [1.278, 0.129, 0.139],
+        [1.311, 0.103, 0.095],
+        [1.868, 0.098, 0.101],
+        [2.708, 0.129, 0.127],
+        [2.032, 0.124, 0.136],
+        [1.022, 0.071, 0.057],
+        [2.765, 0.154, 0.15],
+        [2.702, 0.14, 0.13],
+        [4.135, 0.274, 0.254],
+        [0.714, 0.003, 0.003],
+        [9.436, 0.051, 0.047],
+        [11.087, 0.041, 0.039],
+        [13.908, 0.082, 0.076],
+        [4.92, 0.13, 0.075],
+        [2.035, 0.072, 0.047],
+        [1.828, 0.034, 0.031],
+        [1.965, 0.648, 0.066],
+        [1.161, 0.046, 0.036],
+        [8.188, 0.767, 0.757],
+        [0.407, 0.046, 0.046],
+        [1.644, 0.073, 0.063],
+        [4.1, 0.084, 0.066],
+        [3.865, 0.47, 0.357],
+        [9.949, 0.357, 0.325],
+        [10.01, 0.331, 0.331],
+        [0.691, 0.057, 0.049],
+        [0.808, 0.084, 0.082],
+        [0.406, 0.027, 0.029],
+        [0.816, 0.04, 0.024],
+        [1.344, 0.179, 0.153],
+        [0.498, 0.036, 0.015],
+        [0.441, 0.024, 0.012],
+        [0.35, 0.023, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-v2661/start b/clickhouse-i114640-v2661/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-v2661/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-v2661/stop b/clickhouse-i114640-v2661/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-v2661/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-v2661/template.json b/clickhouse-i114640-v2661/template.json
new file mode 100644
index 0000000000..d2f0f31c54
--- /dev/null
+++ b/clickhouse-i114640-v2661/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 26.6.1.1193)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-w1/benchmark.sh b/clickhouse-i114640-w1/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-w1/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-w1/check b/clickhouse-i114640-w1/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-w1/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-w1/create.sql b/clickhouse-i114640-w1/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-w1/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-w1/data-size b/clickhouse-i114640-w1/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-w1/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-w1/install b/clickhouse-i114640-w1/install
new file mode 100755
index 0000000000..277adaa8cd
--- /dev/null
+++ b/clickhouse-i114640-w1/install
@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 7 (mechanism probes) for https://github.com/ClickHouse/ClickHouse/issues/114640.
+# W1: slow m0711 build with bytes-based two-level conversion disabled.
+SHA=ab8535b3ab0f127a359ba889d9bd26b9456f1897
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-w1/load b/clickhouse-i114640-w1/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-w1/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-w1/queries.sql b/clickhouse-i114640-w1/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-w1/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-w1/query b/clickhouse-i114640-w1/query
new file mode 100755
index 0000000000..d45226c706
--- /dev/null
+++ b/clickhouse-i114640-w1/query
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+# Mechanism probe for issue #114640: group_by_two_level_threshold_bytes=0 on the slow build
+set -e
+
+clickhouse-client --time --format=Pretty --group_by_two_level_threshold_bytes=0
diff --git a/clickhouse-i114640-w1/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-w1/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..dcb2bea4b3
--- /dev/null
+++ b/clickhouse-i114640-w1/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 W1 m0711 no-2lvl-bytes)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 262,
+      "data_size": 15264622797,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.002, 0.001],
+        [0.123, 0.012, 0.011],
+        [0.417, 0.014, 0.012],
+        [0.93, 0.012, 0.012],
+        [0.99, 0.069, 0.075],
+        [1.875, 0.105, 0.102],
+        [0.125, 0.011, 0.01],
+        [0.113, 0.018, 0.017],
+        [2.856, 0.293, 0.266],
+        [3.209, 0.242, 0.299],
+        [1.193, 0.099, 0.093],
+        [1.348, 0.102, 0.117],
+        [3.677, 0.113, 0.114],
+        [4.015, 0.141, 0.126],
+        [2.957, 0.087, 0.079],
+        [1.274, 0.071, 0.061],
+        [2.946, 0.152, 0.154],
+        [2.781, 0.13, 0.124],
+        [4.118, 0.253, 0.26],
+        [0.651, 0.003, 0.002],
+        [9.395, 0.052, 0.051],
+        [11.022, 0.021, 0.021],
+        [13.923, 0.089, 0.062],
+        [4.03, 0.075, 0.084],
+        [1.841, 0.231, 0.161],
+        [1.775, 0.037, 0.028],
+        [1.861, 0.655, 0.095],
+        [1.156, 0.036, 0.024],
+        [10.941, 0.24, 0.216],
+        [0.392, 0.04, 0.04],
+        [2.197, 0.076, 0.06],
+        [4.627, 0.084, 0.071],
+        [3.948, 0.476, 0.367],
+        [10.214, 0.338, 0.317],
+        [10.112, 0.34, 0.33],
+        [1.069, 0.066, 0.05],
+        [0.764, 0.088, 0.076],
+        [0.371, 0.036, 0.038],
+        [0.76, 0.027, 0.028],
+        [1.336, 0.151, 0.207],
+        [0.481, 0.02, 0.017],
+        [0.353, 0.027, 0.03],
+        [0.327, 0.029, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-w1/start b/clickhouse-i114640-w1/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-w1/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-w1/stop b/clickhouse-i114640-w1/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-w1/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-w1/template.json b/clickhouse-i114640-w1/template.json
new file mode 100644
index 0000000000..773c0ccbfc
--- /dev/null
+++ b/clickhouse-i114640-w1/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 W1 m0711 no-2lvl-bytes)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-w2/benchmark.sh b/clickhouse-i114640-w2/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-w2/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-w2/check b/clickhouse-i114640-w2/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-w2/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-w2/create.sql b/clickhouse-i114640-w2/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-w2/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-w2/data-size b/clickhouse-i114640-w2/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-w2/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-w2/install b/clickhouse-i114640-w2/install
new file mode 100755
index 0000000000..7a020c8dbf
--- /dev/null
+++ b/clickhouse-i114640-w2/install
@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 7 (mechanism probes) for https://github.com/ClickHouse/ClickHouse/issues/114640.
+# W2: slow m0711 build with external GROUP BY spill disabled.
+SHA=ab8535b3ab0f127a359ba889d9bd26b9456f1897
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-w2/load b/clickhouse-i114640-w2/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-w2/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-w2/queries.sql b/clickhouse-i114640-w2/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-w2/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-w2/query b/clickhouse-i114640-w2/query
new file mode 100755
index 0000000000..97dadfd254
--- /dev/null
+++ b/clickhouse-i114640-w2/query
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+# Mechanism probe for issue #114640: max_bytes_ratio_before_external_group_by=0 on the slow build
+set -e
+
+clickhouse-client --time --format=Pretty --max_bytes_ratio_before_external_group_by=0
diff --git a/clickhouse-i114640-w2/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-w2/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..7e5b351327
--- /dev/null
+++ b/clickhouse-i114640-w2/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 W2 m0711 no-spill)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 269,
+      "data_size": 15264467214,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.012, 0.001],
+        [0.16, 0.01, 0.011],
+        [0.43, 0.014, 0.012],
+        [0.94, 0.014, 0.011],
+        [0.974, 0.075, 0.082],
+        [1.824, 0.094, 0.096],
+        [0.116, 0.01, 0.01],
+        [0.108, 0.017, 0.017],
+        [1.584, 0.265, 0.23],
+        [1.862, 0.226, 0.236],
+        [1.715, 0.473, 0.609],
+        [1.529, 0.19, 0.281],
+        [1.895, 0.098, 0.088],
+        [2.816, 0.128, 0.169],
+        [2.194, 0.083, 0.077],
+        [0.962, 0.066, 0.059],
+        [3.085, 0.163, 0.146],
+        [2.727, 0.135, 0.124],
+        [4.227, 0.283, 0.258],
+        [0.676, 0.003, 0.003],
+        [9.582, 0.063, 0.052],
+        [11.09, 0.023, 0.02],
+        [13.816, 0.109, 0.068],
+        [5.156, 0.074, 0.072],
+        [2.125, 0.201, 0.158],
+        [1.809, 0.035, 0.032],
+        [2.008, 0.701, 0.148],
+        [1.125, 0.027, 0.033],
+        [8.754, 0.23, 0.225],
+        [0.412, 0.039, 0.039],
+        [1.574, 0.07, 0.068],
+        [3.992, 0.094, 0.073],
+        [3.828, 0.353, 0.354],
+        [10.091, 0.337, 0.32],
+        [9.976, 0.36, 0.317],
+        [0.703, 0.057, 0.05],
+        [0.676, 0.084, 0.052],
+        [0.288, 0.024, 0.024],
+        [0.572, 0.026, 0.015],
+        [0.927, 0.051, 0.045],
+        [0.305, 0.014, 0.011],
+        [0.3, 0.024, 0.009],
+        [0.244, 0.008, 0.007]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-w2/start b/clickhouse-i114640-w2/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-w2/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-w2/stop b/clickhouse-i114640-w2/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-w2/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-w2/template.json b/clickhouse-i114640-w2/template.json
new file mode 100644
index 0000000000..c87760f763
--- /dev/null
+++ b/clickhouse-i114640-w2/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 W2 m0711 no-spill)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-w3/benchmark.sh b/clickhouse-i114640-w3/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-w3/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-w3/check b/clickhouse-i114640-w3/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-w3/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-w3/create.sql b/clickhouse-i114640-w3/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-w3/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-w3/data-size b/clickhouse-i114640-w3/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-w3/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-w3/install b/clickhouse-i114640-w3/install
new file mode 100755
index 0000000000..90f57097eb
--- /dev/null
+++ b/clickhouse-i114640-w3/install
@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 7 (mechanism probes) for https://github.com/ClickHouse/ClickHouse/issues/114640.
+# W3: fast pre-regression build with two-level conversion FORCED (threshold=1 key).
+SHA=ddbfc52e731114d53d83663458ce11d7fe2ad410
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-w3/load b/clickhouse-i114640-w3/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-w3/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-w3/queries.sql b/clickhouse-i114640-w3/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-w3/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-w3/query b/clickhouse-i114640-w3/query
new file mode 100755
index 0000000000..a19332391a
--- /dev/null
+++ b/clickhouse-i114640-w3/query
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+# Mechanism probe for issue #114640: group_by_two_level_threshold=1 on the fast build
+set -e
+
+clickhouse-client --time --format=Pretty --group_by_two_level_threshold=1
diff --git a/clickhouse-i114640-w3/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-w3/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..d1d8ee9472
--- /dev/null
+++ b/clickhouse-i114640-w3/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 W3 y1 force-2lvl)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 255,
+      "data_size": 15264737608,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.127, 0.01, 0.011],
+        [0.409, 0.014, 0.013],
+        [0.917, 0.013, 0.012],
+        [1.001, 0.082, 0.065],
+        [1.943, 0.102, 0.095],
+        [0.18, 0.01, 0.01],
+        [0.125, 0.017, 0.018],
+        [1.611, 0.245, 0.229],
+        [1.925, 0.25, 0.239],
+        [1.296, 0.139, 0.132],
+        [1.375, 0.103, 0.095],
+        [1.914, 0.101, 0.105],
+        [2.728, 0.13, 0.134],
+        [1.971, 0.082, 0.078],
+        [1.016, 0.068, 0.062],
+        [2.723, 0.158, 0.154],
+        [2.661, 0.144, 0.137],
+        [4.072, 0.285, 0.262],
+        [0.636, 0.003, 0.003],
+        [9.607, 0.052, 0.048],
+        [11.069, 0.038, 0.032],
+        [13.911, 0.087, 0.079],
+        [5.284, 0.079, 0.081],
+        [1.906, 0.045, 0.071],
+        [1.735, 0.033, 0.069],
+        [1.883, 0.647, 0.035],
+        [1.218, 0.043, 0.045],
+        [8.053, 0.653, 0.636],
+        [0.428, 0.05, 0.047],
+        [1.613, 0.079, 0.076],
+        [3.96, 0.09, 0.076],
+        [3.889, 0.364, 0.362],
+        [9.912, 0.352, 0.354],
+        [10.25, 0.378, 0.374],
+        [0.699, 0.056, 0.073],
+        [0.802, 0.081, 0.081],
+        [0.371, 0.041, 0.043],
+        [0.759, 0.083, 0.057],
+        [1.216, 0.133, 0.147],
+        [0.345, 0.026, 0.016],
+        [0.376, 0.039, 0.024],
+        [0.263, 0.029, 0.025]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-w3/start b/clickhouse-i114640-w3/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-w3/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-w3/stop b/clickhouse-i114640-w3/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-w3/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-w3/template.json b/clickhouse-i114640-w3/template.json
new file mode 100644
index 0000000000..f0e93b4725
--- /dev/null
+++ b/clickhouse-i114640-w3/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 W3 y1 force-2lvl)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-x1/benchmark.sh b/clickhouse-i114640-x1/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-x1/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-x1/check b/clickhouse-i114640-x1/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-x1/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-x1/create.sql b/clickhouse-i114640-x1/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-x1/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-x1/data-size b/clickhouse-i114640-x1/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-x1/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-x1/install b/clickhouse-i114640-x1/install
new file mode 100755
index 0000000000..e90698d7d0
--- /dev/null
+++ b/clickhouse-i114640-x1/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 4 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# straddle the uniqExact two-level copy-on-write cluster inside the guilty
+# master window 06-29..07-11 (Q10/Q11/Q24/Q26 flipped there in round 3).
+# X1: master @ c3f8ef333f5 (2026-07-02, merged just BEFORE #108928).
+SHA=c3f8ef333f54a4ee33375f4c7f9e9abd112c57e0
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-x1/load b/clickhouse-i114640-x1/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-x1/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-x1/queries.sql b/clickhouse-i114640-x1/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-x1/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-x1/query b/clickhouse-i114640-x1/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-x1/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-x1/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-x1/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..ddcb69dbc6
--- /dev/null
+++ b/clickhouse-i114640-x1/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 X1 pre-108928)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 252,
+      "data_size": 15261497396,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.125, 0.022, 0.01],
+        [0.405, 0.014, 0.012],
+        [0.952, 0.013, 0.012],
+        [1.046, 0.067, 0.08],
+        [1.899, 0.096, 0.105],
+        [0.146, 0.01, 0.01],
+        [0.123, 0.027, 0.024],
+        [1.639, 0.23, 0.242],
+        [1.907, 0.237, 0.256],
+        [1.979, 0.582, 0.269],
+        [1.552, 0.171, 0.259],
+        [1.864, 0.103, 0.095],
+        [2.743, 0.132, 0.121],
+        [2.033, 0.085, 0.082],
+        [1.025, 0.065, 0.057],
+        [2.766, 0.162, 0.156],
+        [2.733, 0.131, 0.127],
+        [4.171, 0.273, 0.27],
+        [0.678, 0.003, 0.003],
+        [9.557, 0.048, 0.045],
+        [11.087, 0.022, 0.021],
+        [13.83, 0.091, 0.061],
+        [5.101, 0.077, 0.074],
+        [1.966, 0.145, 0.143],
+        [1.814, 0.035, 0.029],
+        [1.98, 0.647, 0.115],
+        [1.151, 0.026, 0.026],
+        [8.169, 0.68, 0.66],
+        [0.397, 0.076, 0.047],
+        [1.61, 0.067, 0.061],
+        [3.878, 0.084, 0.082],
+        [3.826, 0.362, 0.354],
+        [9.952, 0.335, 0.314],
+        [9.831, 0.343, 0.364],
+        [0.711, 0.053, 0.047],
+        [0.686, 0.08, 0.075],
+        [0.435, 0.04, 0.038],
+        [0.752, 0.024, 0.022],
+        [1.297, 0.142, 0.116],
+        [0.344, 0.017, 0.017],
+        [0.333, 0.025, 0.011],
+        [0.322, 0.022, 0.01]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-x1/start b/clickhouse-i114640-x1/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-x1/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-x1/stop b/clickhouse-i114640-x1/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-x1/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-x1/template.json b/clickhouse-i114640-x1/template.json
new file mode 100644
index 0000000000..92da0b2395
--- /dev/null
+++ b/clickhouse-i114640-x1/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 X1 pre-108928)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-x2/benchmark.sh b/clickhouse-i114640-x2/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-x2/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-x2/check b/clickhouse-i114640-x2/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-x2/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-x2/create.sql b/clickhouse-i114640-x2/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-x2/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-x2/data-size b/clickhouse-i114640-x2/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-x2/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-x2/install b/clickhouse-i114640-x2/install
new file mode 100755
index 0000000000..9f11d52dca
--- /dev/null
+++ b/clickhouse-i114640-x2/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 4 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# straddle the uniqExact two-level copy-on-write cluster inside the guilty
+# master window 06-29..07-11 (Q10/Q11/Q24/Q26 flipped there in round 3).
+# X2: master @ 597ffae623d (2026-07-05, has #108928, lacks #109389).
+SHA=597ffae623d4683ab2df45fa6efe2f2028bccf2e
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-x2/load b/clickhouse-i114640-x2/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-x2/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-x2/queries.sql b/clickhouse-i114640-x2/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-x2/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-x2/query b/clickhouse-i114640-x2/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-x2/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-x2/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-x2/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..9d35a7e54c
--- /dev/null
+++ b/clickhouse-i114640-x2/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 X2 with-108928)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 249,
+      "data_size": 15266828950,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.113, 0.011, 0.012],
+        [0.36, 0.013, 0.012],
+        [0.982, 0.013, 0.012],
+        [0.993, 0.071, 0.064],
+        [1.936, 0.091, 0.095],
+        [0.08, 0.01, 0.011],
+        [0.119, 0.047, 0.017],
+        [1.56, 0.255, 0.249],
+        [1.872, 0.259, 0.264],
+        [1.688, 0.464, 0.534],
+        [1.473, 0.221, 0.216],
+        [1.947, 0.099, 0.096],
+        [2.765, 0.136, 0.117],
+        [2.165, 0.122, 0.09],
+        [1.008, 0.077, 0.057],
+        [2.838, 0.174, 0.153],
+        [2.771, 0.159, 0.117],
+        [4.334, 0.263, 0.29],
+        [0.656, 0.002, 0.002],
+        [9.583, 0.056, 0.048],
+        [11.053, 0.022, 0.021],
+        [13.705, 0.073, 0.062],
+        [4.221, 0.074, 0.073],
+        [2.081, 0.177, 0.15],
+        [1.828, 0.032, 0.034],
+        [2.04, 0.792, 0.13],
+        [1.143, 0.028, 0.052],
+        [8.48, 0.216, 0.209],
+        [0.375, 0.038, 0.038],
+        [1.628, 0.072, 0.074],
+        [3.987, 0.102, 0.071],
+        [3.922, 0.354, 0.36],
+        [9.868, 0.348, 0.32],
+        [9.959, 0.347, 0.348],
+        [0.682, 0.055, 0.057],
+        [0.517, 0.069, 0.036],
+        [0.342, 0.025, 0.027],
+        [0.49, 0.068, 0.015],
+        [0.905, 0.057, 0.055],
+        [0.327, 0.014, 0.014],
+        [0.34, 0.01, 0.01],
+        [0.223, 0.008, 0.008]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-x2/start b/clickhouse-i114640-x2/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-x2/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-x2/stop b/clickhouse-i114640-x2/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-x2/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-x2/template.json b/clickhouse-i114640-x2/template.json
new file mode 100644
index 0000000000..c8dddafd89
--- /dev/null
+++ b/clickhouse-i114640-x2/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 X2 with-108928)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-x3/benchmark.sh b/clickhouse-i114640-x3/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-x3/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-x3/check b/clickhouse-i114640-x3/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-x3/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-x3/create.sql b/clickhouse-i114640-x3/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-x3/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-x3/data-size b/clickhouse-i114640-x3/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-x3/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-x3/install b/clickhouse-i114640-x3/install
new file mode 100755
index 0000000000..ce6f8b8dd3
--- /dev/null
+++ b/clickhouse-i114640-x3/install
@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 4 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# straddle the uniqExact two-level copy-on-write cluster inside the guilty
+# master window 06-29..07-11 (Q10/Q11/Q24/Q26 flipped there in round 3).
+# X3: master @ 6a27522419b (2026-07-07, has #108928 AND #109389).
+SHA=6a27522419b52820f04900d9fa5ff4b006acd433
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-x3/load b/clickhouse-i114640-x3/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-x3/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-x3/queries.sql b/clickhouse-i114640-x3/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-x3/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-x3/query b/clickhouse-i114640-x3/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-x3/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-x3/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-x3/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..b95cf774a0
--- /dev/null
+++ b/clickhouse-i114640-x3/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 X3 with-109389)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 254,
+      "data_size": 15273637911,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.002, 0.001],
+        [0.135, 0.012, 0.011],
+        [0.389, 0.014, 0.014],
+        [0.887, 0.025, 0.012],
+        [1.016, 0.073, 0.079],
+        [1.95, 0.1, 0.097],
+        [0.138, 0.025, 0.01],
+        [0.124, 0.018, 0.027],
+        [1.594, 0.252, 0.248],
+        [1.969, 0.276, 0.273],
+        [1.666, 0.501, 0.295],
+        [1.571, 0.249, 0.247],
+        [1.828, 0.099, 0.108],
+        [2.634, 0.136, 0.129],
+        [2.128, 0.083, 0.08],
+        [1.029, 0.066, 0.083],
+        [2.706, 0.154, 0.153],
+        [2.675, 0.146, 0.127],
+        [4.146, 0.27, 0.262],
+        [0.718, 0.003, 0.002],
+        [9.522, 0.057, 0.047],
+        [11.004, 0.024, 0.021],
+        [13.937, 0.077, 0.064],
+        [5.34, 0.076, 0.074],
+        [2.01, 0.211, 0.159],
+        [1.823, 0.085, 0.027],
+        [2.027, 0.928, 0.168],
+        [1.176, 0.037, 0.024],
+        [8.708, 0.241, 0.238],
+        [0.409, 0.038, 0.038],
+        [1.623, 0.068, 0.067],
+        [3.857, 0.084, 0.072],
+        [3.971, 0.385, 0.351],
+        [9.788, 0.352, 0.322],
+        [9.849, 0.361, 0.349],
+        [0.704, 0.058, 0.068],
+        [0.633, 0.108, 0.087],
+        [0.439, 0.041, 0.042],
+        [0.729, 0.025, 0.025],
+        [1.088, 0.139, 0.135],
+        [0.344, 0.032, 0.019],
+        [0.306, 0.04, 0.012],
+        [0.235, 0.025, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-x3/start b/clickhouse-i114640-x3/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-x3/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-x3/stop b/clickhouse-i114640-x3/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-x3/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-x3/template.json b/clickhouse-i114640-x3/template.json
new file mode 100644
index 0000000000..b990016cac
--- /dev/null
+++ b/clickhouse-i114640-x3/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 X3 with-109389)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-y1/benchmark.sh b/clickhouse-i114640-y1/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-y1/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-y1/check b/clickhouse-i114640-y1/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-y1/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-y1/create.sql b/clickhouse-i114640-y1/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-y1/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-y1/data-size b/clickhouse-i114640-y1/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-y1/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-y1/install b/clickhouse-i114640-y1/install
new file mode 100755
index 0000000000..22d318fdad
--- /dev/null
+++ b/clickhouse-i114640-y1/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 5 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# the guilty window is master 06-29..07-02 (round 4: X1 already slow, so both
+# uniqExact PRs, read_in_order and LIMIT WITH TIES are exonerated). The window
+# contains the qcc-for-topn merge (#104478) and two more QCC changes, and the
+# affected queries are exactly the ones whose hot runs benefit from the query
+# condition cache. Y1: master @ ddbfc52e731 (06-30 23:42, just BEFORE qcc-for-topn).
+SHA=ddbfc52e731114d53d83663458ce11d7fe2ad410
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-y1/load b/clickhouse-i114640-y1/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-y1/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-y1/queries.sql b/clickhouse-i114640-y1/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-y1/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-y1/query b/clickhouse-i114640-y1/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-y1/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-y1/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-y1/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..293b327926
--- /dev/null
+++ b/clickhouse-i114640-y1/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Y1 pre-qcc-topn)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 270,
+      "data_size": 15261574166,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.121, 0.011, 0.012],
+        [0.446, 0.013, 0.013],
+        [0.915, 0.013, 0.025],
+        [1.012, 0.07, 0.083],
+        [1.873, 0.094, 0.086],
+        [0.1, 0.01, 0.011],
+        [0.11, 0.017, 0.033],
+        [1.575, 0.291, 0.239],
+        [1.942, 0.242, 0.217],
+        [1.298, 0.124, 0.129],
+        [1.289, 0.112, 0.078],
+        [1.998, 0.099, 0.107],
+        [2.748, 0.128, 0.129],
+        [2.107, 0.084, 0.078],
+        [0.996, 0.068, 0.054],
+        [2.721, 0.168, 0.149],
+        [2.702, 0.141, 0.118],
+        [4.217, 0.282, 0.265],
+        [0.714, 0.002, 0.002],
+        [9.587, 0.055, 0.05],
+        [11.099, 0.04, 0.034],
+        [13.843, 0.112, 0.078],
+        [5.566, 0.079, 0.08],
+        [1.873, 0.107, 0.087],
+        [1.766, 0.04, 0.037],
+        [1.999, 0.586, 0.059],
+        [1.155, 0.044, 0.04],
+        [8.087, 0.718, 0.707],
+        [0.47, 0.092, 0.047],
+        [1.566, 0.077, 0.064],
+        [4.141, 0.083, 0.068],
+        [3.848, 0.369, 0.357],
+        [10.197, 0.328, 0.305],
+        [9.86, 0.331, 0.34],
+        [0.684, 0.056, 0.047],
+        [0.751, 0.076, 0.072],
+        [0.382, 0.042, 0.034],
+        [0.876, 0.028, 0.025],
+        [1.366, 0.161, 0.203],
+        [0.424, 0.017, 0.018],
+        [0.356, 0.026, 0.014],
+        [0.222, 0.02, 0.008]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-y1/start b/clickhouse-i114640-y1/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-y1/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-y1/stop b/clickhouse-i114640-y1/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-y1/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-y1/template.json b/clickhouse-i114640-y1/template.json
new file mode 100644
index 0000000000..487c59ea5d
--- /dev/null
+++ b/clickhouse-i114640-y1/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Y1 pre-qcc-topn)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-y2/benchmark.sh b/clickhouse-i114640-y2/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-y2/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-y2/check b/clickhouse-i114640-y2/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-y2/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-y2/create.sql b/clickhouse-i114640-y2/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-y2/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-y2/data-size b/clickhouse-i114640-y2/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-y2/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-y2/install b/clickhouse-i114640-y2/install
new file mode 100755
index 0000000000..28e0e33773
--- /dev/null
+++ b/clickhouse-i114640-y2/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 5 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# the guilty window is master 06-29..07-02 (round 4: X1 already slow, so both
+# uniqExact PRs, read_in_order and LIMIT WITH TIES are exonerated). The window
+# contains the qcc-for-topn merge (#104478) and two more QCC changes, and the
+# affected queries are exactly the ones whose hot runs benefit from the query
+# condition cache. Y2: master @ 61b644e0380 (07-01 02:50, just AFTER qcc-for-topn #104478).
+SHA=61b644e0380dce867eb6460872e685e20c6bf506
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-y2/load b/clickhouse-i114640-y2/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-y2/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-y2/queries.sql b/clickhouse-i114640-y2/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-y2/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-y2/query b/clickhouse-i114640-y2/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-y2/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-y2/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-y2/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..214f5a4c8e
--- /dev/null
+++ b/clickhouse-i114640-y2/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Y2 post-qcc-topn)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 257,
+      "data_size": 15267886141,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.111, 0.011, 0.011],
+        [0.435, 0.014, 0.013],
+        [0.924, 0.012, 0.012],
+        [1.065, 0.069, 0.075],
+        [1.915, 0.099, 0.101],
+        [0.128, 0.011, 0.011],
+        [0.122, 0.016, 0.027],
+        [1.594, 0.226, 0.228],
+        [2.038, 0.236, 0.282],
+        [1.286, 0.137, 0.135],
+        [1.36, 0.107, 0.096],
+        [1.871, 0.111, 0.11],
+        [2.762, 0.13, 0.13],
+        [2.013, 0.083, 0.082],
+        [1.05, 0.063, 0.076],
+        [2.676, 0.155, 0.155],
+        [2.736, 0.13, 0.132],
+        [4.137, 0.278, 0.28],
+        [0.73, 0.003, 0.002],
+        [9.563, 0.051, 0.048],
+        [11.09, 0.038, 0.035],
+        [13.939, 0.086, 0.079],
+        [5.025, 0.078, 0.075],
+        [1.961, 0.183, 0.126],
+        [1.761, 0.035, 0.061],
+        [1.906, 0.783, 0.164],
+        [1.204, 0.084, 0.042],
+        [8.045, 0.676, 0.674],
+        [0.473, 0.048, 0.047],
+        [1.602, 0.07, 0.073],
+        [3.95, 0.083, 0.072],
+        [3.862, 0.471, 0.354],
+        [9.876, 0.33, 0.319],
+        [10.018, 0.388, 0.339],
+        [0.716, 0.07, 0.056],
+        [0.756, 0.08, 0.061],
+        [0.396, 0.049, 0.036],
+        [0.845, 0.032, 0.028],
+        [1.374, 0.156, 0.185],
+        [0.425, 0.021, 0.017],
+        [0.377, 0.031, 0.012],
+        [0.353, 0.028, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-y2/start b/clickhouse-i114640-y2/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-y2/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-y2/stop b/clickhouse-i114640-y2/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-y2/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-y2/template.json b/clickhouse-i114640-y2/template.json
new file mode 100644
index 0000000000..3a3d21b7a0
--- /dev/null
+++ b/clickhouse-i114640-y2/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Y2 post-qcc-topn)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-y3/benchmark.sh b/clickhouse-i114640-y3/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-y3/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-y3/check b/clickhouse-i114640-y3/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-y3/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-y3/create.sql b/clickhouse-i114640-y3/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-y3/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-y3/data-size b/clickhouse-i114640-y3/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-y3/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-y3/install b/clickhouse-i114640-y3/install
new file mode 100755
index 0000000000..e69d931247
--- /dev/null
+++ b/clickhouse-i114640-y3/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 5 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# the guilty window is master 06-29..07-02 (round 4: X1 already slow, so both
+# uniqExact PRs, read_in_order and LIMIT WITH TIES are exonerated). The window
+# contains the qcc-for-topn merge (#104478) and two more QCC changes, and the
+# affected queries are exactly the ones whose hot runs benefit from the query
+# condition cache. Y3: the known-SLOW master 07-11 build, with use_query_condition_cache=0.
+SHA=ab8535b3ab0f127a359ba889d9bd26b9456f1897
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-y3/load b/clickhouse-i114640-y3/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-y3/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-y3/queries.sql b/clickhouse-i114640-y3/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-y3/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-y3/query b/clickhouse-i114640-y3/query
new file mode 100755
index 0000000000..d828192cc3
--- /dev/null
+++ b/clickhouse-i114640-y3/query
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+# Mechanism probe for issue #114640: query condition cache disabled.
+set -e
+
+clickhouse-client --time --format=Pretty --use_query_condition_cache=0
diff --git a/clickhouse-i114640-y3/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-y3/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..40d0fc6e74
--- /dev/null
+++ b/clickhouse-i114640-y3/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Y3 m0711 qcc-off)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 241,
+      "data_size": 15267840006,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.002, 0.001],
+        [0.134, 0.011, 0.021],
+        [0.384, 0.014, 0.012],
+        [0.903, 0.013, 0.011],
+        [1.172, 0.06, 0.061],
+        [1.909, 0.104, 0.09],
+        [0.122, 0.011, 0.01],
+        [0.13, 0.017, 0.028],
+        [1.591, 0.218, 0.251],
+        [1.896, 0.237, 0.234],
+        [1.57, 0.35, 0.344],
+        [1.52, 0.219, 0.218],
+        [1.859, 0.126, 0.106],
+        [2.676, 0.14, 0.138],
+        [2.105, 0.085, 0.079],
+        [1.028, 0.068, 0.069],
+        [2.728, 0.151, 0.163],
+        [2.716, 0.143, 0.125],
+        [4.17, 0.264, 0.276],
+        [0.7, 0.009, 0.008],
+        [9.542, 0.077, 0.069],
+        [11.027, 0.079, 0.073],
+        [13.772, 0.105, 0.092],
+        [5.129, 0.073, 0.069],
+        [1.942, 0.077, 0.067],
+        [1.717, 0.029, 0.029],
+        [2.067, 0.817, 0.063],
+        [1.186, 0.026, 0.023],
+        [8.49, 0.215, 0.218],
+        [0.572, 0.042, 0.039],
+        [1.526, 0.072, 0.075],
+        [3.837, 0.081, 0.073],
+        [4.028, 0.482, 0.36],
+        [9.883, 0.366, 0.331],
+        [9.869, 0.336, 0.328],
+        [0.736, 0.055, 0.052],
+        [0.826, 0.07, 0.079],
+        [0.478, 0.047, 0.03],
+        [0.875, 0.034, 0.044],
+        [1.272, 0.148, 0.13],
+        [0.504, 0.018, 0.014],
+        [0.376, 0.012, 0.012],
+        [0.278, 0.01, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-y3/start b/clickhouse-i114640-y3/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-y3/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-y3/stop b/clickhouse-i114640-y3/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-y3/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-y3/template.json b/clickhouse-i114640-y3/template.json
new file mode 100644
index 0000000000..de579a4be3
--- /dev/null
+++ b/clickhouse-i114640-y3/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Y3 m0711 qcc-off)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-y4/benchmark.sh b/clickhouse-i114640-y4/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-y4/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-y4/check b/clickhouse-i114640-y4/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-y4/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-y4/create.sql b/clickhouse-i114640-y4/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-y4/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-y4/data-size b/clickhouse-i114640-y4/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-y4/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-y4/install b/clickhouse-i114640-y4/install
new file mode 100755
index 0000000000..19190af1ee
--- /dev/null
+++ b/clickhouse-i114640-y4/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 5 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# the guilty window is master 06-29..07-02 (round 4: X1 already slow, so both
+# uniqExact PRs, read_in_order and LIMIT WITH TIES are exonerated). The window
+# contains the qcc-for-topn merge (#104478) and two more QCC changes, and the
+# affected queries are exactly the ones whose hot runs benefit from the query
+# condition cache. Y4: the known-FAST pre-qcc-topn build, with use_query_condition_cache=0. If this is slow, the fast mode depends on the QCC.
+SHA=ddbfc52e731114d53d83663458ce11d7fe2ad410
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-y4/load b/clickhouse-i114640-y4/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-y4/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-y4/queries.sql b/clickhouse-i114640-y4/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-y4/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-y4/query b/clickhouse-i114640-y4/query
new file mode 100755
index 0000000000..d828192cc3
--- /dev/null
+++ b/clickhouse-i114640-y4/query
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+# Mechanism probe for issue #114640: query condition cache disabled.
+set -e
+
+clickhouse-client --time --format=Pretty --use_query_condition_cache=0
diff --git a/clickhouse-i114640-y4/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-y4/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..e5324ef857
--- /dev/null
+++ b/clickhouse-i114640-y4/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Y4 Y1 qcc-off)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 286,
+      "data_size": 15263747664,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.034, 0.001],
+        [0.121, 0.013, 0.012],
+        [0.383, 0.025, 0.021],
+        [0.939, 0.025, 0.013],
+        [1.009, 0.067, 0.066],
+        [1.903, 0.122, 0.102],
+        [0.098, 0.01, 0.01],
+        [0.129, 0.029, 0.018],
+        [1.57, 0.239, 0.226],
+        [1.909, 0.243, 0.227],
+        [1.283, 0.137, 0.144],
+        [1.33, 0.098, 0.092],
+        [1.837, 0.098, 0.106],
+        [2.668, 0.132, 0.127],
+        [2.031, 0.087, 0.087],
+        [1.011, 0.066, 0.066],
+        [2.601, 0.162, 0.155],
+        [2.619, 0.148, 0.129],
+        [4.123, 0.292, 0.262],
+        [0.667, 0.009, 0.008],
+        [9.621, 0.073, 0.078],
+        [11.089, 0.111, 0.097],
+        [13.97, 0.151, 0.137],
+        [5.063, 0.152, 0.076],
+        [1.969, 0.071, 0.085],
+        [1.776, 0.034, 0.036],
+        [1.971, 0.606, 0.048],
+        [1.18, 0.038, 0.045],
+        [8.063, 0.69, 0.673],
+        [0.389, 0.066, 0.047],
+        [1.532, 0.075, 0.067],
+        [4.039, 0.083, 0.074],
+        [3.836, 0.359, 0.348],
+        [9.889, 0.326, 0.331],
+        [10.166, 0.345, 0.342],
+        [0.699, 0.055, 0.055],
+        [0.734, 0.079, 0.078],
+        [0.416, 0.066, 0.027],
+        [0.717, 0.028, 0.025],
+        [1.123, 0.136, 0.121],
+        [0.348, 0.035, 0.019],
+        [0.368, 0.03, 0.012],
+        [0.266, 0.011, 0.021]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-y4/start b/clickhouse-i114640-y4/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-y4/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-y4/stop b/clickhouse-i114640-y4/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-y4/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-y4/template.json b/clickhouse-i114640-y4/template.json
new file mode 100644
index 0000000000..65de9be01f
--- /dev/null
+++ b/clickhouse-i114640-y4/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Y4 Y1 qcc-off)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-z1/benchmark.sh b/clickhouse-i114640-z1/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-z1/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-z1/check b/clickhouse-i114640-z1/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-z1/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-z1/create.sql b/clickhouse-i114640-z1/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-z1/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-z1/data-size b/clickhouse-i114640-z1/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-z1/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-z1/install b/clickhouse-i114640-z1/install
new file mode 100755
index 0000000000..da85a5e053
--- /dev/null
+++ b/clickhouse-i114640-z1/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 6 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# surgical straddle of #107490 (Aggregator memory usage accounting, merged
+# 8fa9200c0a8 on 07-01 07:35). Round 5 isolated the Q10/Q11 flip to
+# 07-01 02:50 .. 07-02 10:05 and proved it is NOT query-condition-cache
+# related; #107490 changes the accounting that feeds the aggregation
+# two-level-conversion bytes threshold. Z1: master @ c79b0d9227e (07-01 07:31, 4 minutes BEFORE #107490).
+SHA=c79b0d9227e23490a4779c274e946b2e4f991b50
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-z1/load b/clickhouse-i114640-z1/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-z1/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-z1/queries.sql b/clickhouse-i114640-z1/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-z1/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-z1/query b/clickhouse-i114640-z1/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-z1/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-z1/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-z1/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..1660267537
--- /dev/null
+++ b/clickhouse-i114640-z1/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Z1 pre-107490)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 247,
+      "data_size": 15264573484,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.001, 0.001, 0.001],
+        [0.149, 0.011, 0.033],
+        [0.408, 0.013, 0.012],
+        [0.914, 0.022, 0.02],
+        [1.008, 0.075, 0.079],
+        [1.811, 0.094, 0.125],
+        [0.128, 0.01, 0.011],
+        [0.154, 0.017, 0.017],
+        [1.585, 0.224, 0.23],
+        [1.889, 0.242, 0.221],
+        [1.222, 0.133, 0.141],
+        [1.439, 0.097, 0.092],
+        [1.853, 0.101, 0.155],
+        [2.76, 0.133, 0.134],
+        [2.002, 0.085, 0.113],
+        [0.974, 0.078, 0.075],
+        [2.704, 0.155, 0.155],
+        [2.777, 0.131, 0.121],
+        [4.102, 0.289, 0.272],
+        [0.685, 0.003, 0.003],
+        [9.479, 0.061, 0.053],
+        [10.991, 0.037, 0.035],
+        [13.844, 0.09, 0.087],
+        [4.395, 0.075, 0.075],
+        [1.979, 0.196, 0.14],
+        [1.816, 0.028, 0.029],
+        [1.944, 0.835, 0.192],
+        [1.201, 0.043, 0.049],
+        [8.133, 0.727, 0.779],
+        [0.438, 0.06, 0.067],
+        [1.562, 0.088, 0.067],
+        [3.965, 0.088, 0.078],
+        [4.009, 0.455, 0.37],
+        [9.844, 0.364, 0.336],
+        [9.791, 0.355, 0.326],
+        [0.702, 0.061, 0.073],
+        [0.858, 0.087, 0.092],
+        [0.414, 0.044, 0.036],
+        [0.807, 0.03, 0.029],
+        [1.312, 0.19, 0.154],
+        [0.429, 0.02, 0.019],
+        [0.396, 0.03, 0.012],
+        [0.28, 0.022, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-z1/start b/clickhouse-i114640-z1/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-z1/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-z1/stop b/clickhouse-i114640-z1/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-z1/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-z1/template.json b/clickhouse-i114640-z1/template.json
new file mode 100644
index 0000000000..9bb7edd74f
--- /dev/null
+++ b/clickhouse-i114640-z1/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Z1 pre-107490)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}
diff --git a/clickhouse-i114640-z2/benchmark.sh b/clickhouse-i114640-z2/benchmark.sh
new file mode 100755
index 0000000000..6a7f75fd0f
--- /dev/null
+++ b/clickhouse-i114640-z2/benchmark.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export BENCH_DOWNLOAD_SCRIPT="download-hits-parquet-partitioned"
+# Skip the concurrent-QPS phase: this system exists only for the per-query
+# A/B of https://github.com/ClickHouse/ClickHouse/issues/114640.
+export BENCH_CONCURRENT_DURATION=0
+exec ../lib/benchmark-common.sh
diff --git a/clickhouse-i114640-z2/check b/clickhouse-i114640-z2/check
new file mode 100755
index 0000000000..febe4e0de2
--- /dev/null
+++ b/clickhouse-i114640-z2/check
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT 1" >/dev/null
diff --git a/clickhouse-i114640-z2/create.sql b/clickhouse-i114640-z2/create.sql
new file mode 100644
index 0000000000..a6311a5a8c
--- /dev/null
+++ b/clickhouse-i114640-z2/create.sql
@@ -0,0 +1,112 @@
+CREATE OR REPLACE TABLE hits
+(
+    WatchID BIGINT NOT NULL,
+    JavaEnable SMALLINT NOT NULL,
+    Title TEXT NOT NULL,
+    GoodEvent SMALLINT NOT NULL,
+    EventTime TIMESTAMP NOT NULL,
+    EventDate Date NOT NULL,
+    CounterID INTEGER NOT NULL,
+    ClientIP INTEGER NOT NULL,
+    RegionID INTEGER NOT NULL,
+    UserID BIGINT NOT NULL,
+    CounterClass SMALLINT NOT NULL,
+    OS SMALLINT NOT NULL,
+    UserAgent SMALLINT NOT NULL,
+    URL TEXT NOT NULL,
+    Referer TEXT NOT NULL,
+    IsRefresh SMALLINT NOT NULL,
+    RefererCategoryID SMALLINT NOT NULL,
+    RefererRegionID INTEGER NOT NULL,
+    URLCategoryID SMALLINT NOT NULL,
+    URLRegionID INTEGER NOT NULL,
+    ResolutionWidth SMALLINT NOT NULL,
+    ResolutionHeight SMALLINT NOT NULL,
+    ResolutionDepth SMALLINT NOT NULL,
+    FlashMajor SMALLINT NOT NULL,
+    FlashMinor SMALLINT NOT NULL,
+    FlashMinor2 TEXT NOT NULL,
+    NetMajor SMALLINT NOT NULL,
+    NetMinor SMALLINT NOT NULL,
+    UserAgentMajor SMALLINT NOT NULL,
+    UserAgentMinor VARCHAR(255) NOT NULL,
+    CookieEnable SMALLINT NOT NULL,
+    JavascriptEnable SMALLINT NOT NULL,
+    IsMobile SMALLINT NOT NULL,
+    MobilePhone SMALLINT NOT NULL,
+    MobilePhoneModel TEXT NOT NULL,
+    Params TEXT NOT NULL,
+    IPNetworkID INTEGER NOT NULL,
+    TraficSourceID SMALLINT NOT NULL,
+    SearchEngineID SMALLINT NOT NULL,
+    SearchPhrase TEXT NOT NULL,
+    AdvEngineID SMALLINT NOT NULL,
+    IsArtifical SMALLINT NOT NULL,
+    WindowClientWidth SMALLINT NOT NULL,
+    WindowClientHeight SMALLINT NOT NULL,
+    ClientTimeZone SMALLINT NOT NULL,
+    ClientEventTime TIMESTAMP NOT NULL,
+    SilverlightVersion1 SMALLINT NOT NULL,
+    SilverlightVersion2 SMALLINT NOT NULL,
+    SilverlightVersion3 INTEGER NOT NULL,
+    SilverlightVersion4 SMALLINT NOT NULL,
+    PageCharset TEXT NOT NULL,
+    CodeVersion INTEGER NOT NULL,
+    IsLink SMALLINT NOT NULL,
+    IsDownload SMALLINT NOT NULL,
+    IsNotBounce SMALLINT NOT NULL,
+    FUniqID BIGINT NOT NULL,
+    OriginalURL TEXT NOT NULL,
+    HID INTEGER NOT NULL,
+    IsOldCounter SMALLINT NOT NULL,
+    IsEvent SMALLINT NOT NULL,
+    IsParameter SMALLINT NOT NULL,
+    DontCountHits SMALLINT NOT NULL,
+    WithHash SMALLINT NOT NULL,
+    HitColor CHAR NOT NULL,
+    LocalEventTime TIMESTAMP NOT NULL,
+    Age SMALLINT NOT NULL,
+    Sex SMALLINT NOT NULL,
+    Income SMALLINT NOT NULL,
+    Interests SMALLINT NOT NULL,
+    Robotness SMALLINT NOT NULL,
+    RemoteIP INTEGER NOT NULL,
+    WindowName INTEGER NOT NULL,
+    OpenerName INTEGER NOT NULL,
+    HistoryLength SMALLINT NOT NULL,
+    BrowserLanguage TEXT NOT NULL,
+    BrowserCountry TEXT NOT NULL,
+    SocialNetwork TEXT NOT NULL,
+    SocialAction TEXT NOT NULL,
+    HTTPError SMALLINT NOT NULL,
+    SendTiming INTEGER NOT NULL,
+    DNSTiming INTEGER NOT NULL,
+    ConnectTiming INTEGER NOT NULL,
+    ResponseStartTiming INTEGER NOT NULL,
+    ResponseEndTiming INTEGER NOT NULL,
+    FetchTiming INTEGER NOT NULL,
+    SocialSourceNetworkID SMALLINT NOT NULL,
+    SocialSourcePage TEXT NOT NULL,
+    ParamPrice BIGINT NOT NULL,
+    ParamOrderID TEXT NOT NULL,
+    ParamCurrency TEXT NOT NULL,
+    ParamCurrencyID SMALLINT NOT NULL,
+    OpenstatServiceName TEXT NOT NULL,
+    OpenstatCampaignID TEXT NOT NULL,
+    OpenstatAdID TEXT NOT NULL,
+    OpenstatSourceID TEXT NOT NULL,
+    UTMSource TEXT NOT NULL,
+    UTMMedium TEXT NOT NULL,
+    UTMCampaign TEXT NOT NULL,
+    UTMContent TEXT NOT NULL,
+    UTMTerm TEXT NOT NULL,
+    FromTag TEXT NOT NULL,
+    HasGCLID SMALLINT NOT NULL,
+    RefererHash BIGINT NOT NULL,
+    URLHash BIGINT NOT NULL,
+    CLID INTEGER NOT NULL,
+    PRIMARY KEY (CounterID, EventDate, UserID, EventTime, WatchID)
+)
+ENGINE = MergeTree
+SETTINGS fsync_after_insert = 1, -- https://github.com/ClickHouse/ClickBench/issues/678
+    auto_statistics_types = ''; -- per-column uniqState blobs grow with cardinality (~140 KB for high-card columns × ~30 such columns ≈ 4 MB per part of statistics.packed). Cold queries pay the load cost before cached_estimator is populated by the bg refresh task. Disabling stops the auto-stats files from being created on merge.
diff --git a/clickhouse-i114640-z2/data-size b/clickhouse-i114640-z2/data-size
new file mode 100755
index 0000000000..7770f6efb6
--- /dev/null
+++ b/clickhouse-i114640-z2/data-size
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+clickhouse-client --query "SELECT total_bytes FROM system.tables WHERE name = 'hits' AND database = 'default'"
diff --git a/clickhouse-i114640-z2/install b/clickhouse-i114640-z2/install
new file mode 100755
index 0000000000..10a94d6e61
--- /dev/null
+++ b/clickhouse-i114640-z2/install
@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e -o pipefail
+
+# Round 6 of the A/B for https://github.com/ClickHouse/ClickHouse/issues/114640:
+# surgical straddle of #107490 (Aggregator memory usage accounting, merged
+# 8fa9200c0a8 on 07-01 07:35). Round 5 isolated the Q10/Q11 flip to
+# 07-01 02:50 .. 07-02 10:05 and proved it is NOT query-condition-cache
+# related; #107490 changes the accounting that feeds the aggregation
+# two-level-conversion bytes threshold. Z2: master @ 32129f76fca (07-01 07:39, 4 minutes AFTER #107490; only #107490 and a CI-only fuzz PR in between).
+SHA=32129f76fca7904f4b219e678d9426a08e965ffd
+
+if [ ! -x /usr/bin/clickhouse ]; then
+    curl -fsSL --retry 10 --retry-delay 10 --retry-all-errors -o clickhouse \
+        "https://clickhouse-builds.s3.amazonaws.com/REFs/master/${SHA}/build_amd_release/clickhouse"
+    chmod +x clickhouse
+    sudo ./clickhouse install --noninteractive
+fi
+
+# Force synchronous startup loading so the cold timer doesn't catch
+# work that should have been amortized into ./start.
+#
+# Two independent layers of laziness contribute to the cold-query floor:
+#
+# 1. async_load_databases (server-level): with the default 1, the server
+#    binds its listen port and answers SELECT 1 before user databases
+#    have finished loading. ./check passes, then the first query stalls
+#    waiting for the part loader.
+#
+# 2. primary_key_lazy_load and columns_and_secondary_indices_sizes_lazy_calculation
+#    (MergeTree-level): even after parts are loaded, the in-memory
+#    primary key and the per-column .size streams are populated lazily
+#    on first query. With ~25 parts × ~80 columns × multiple metadata
+#    files per column that's >1.8k file opens on the first query path,
+#    contributing several hundred ms even on local NVMe.
+#
+# Both are eager-load toggles, not caching shortcuts: the same I/O
+# happens either way, just before query timing instead of during it.
+# Together they brought Q40 cold from ~3 s to ~1.5 s on c6a.4xlarge.
+sudo mkdir -p /etc/clickhouse-server/config.d
+sudo tee /etc/clickhouse-server/config.d/eager_load.yaml >/dev/null <<'EOF'
+async_load_databases: false
+merge_tree:
+  primary_key_lazy_load: 0
+  columns_and_secondary_indices_sizes_lazy_calculation: 0
+EOF
diff --git a/clickhouse-i114640-z2/load b/clickhouse-i114640-z2/load
new file mode 100755
index 0000000000..df578a617c
--- /dev/null
+++ b/clickhouse-i114640-z2/load
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+clickhouse-client < create.sql
+
+# Symlink the parquet files into ClickHouse's user_files dir rather than
+# moving them. mv on a 14 GB partitioned dataset wastes minutes copying
+# bytes the daemon will only read once and then we delete; ln -s is
+# instant. chown -h sets the symlink's owner (does not follow into the
+# target), which is enough — the underlying parquets are mode 644, so
+# the clickhouse user can read them through the symlinks regardless.
+for f in hits_*.parquet; do
+    sudo ln -sf "$PWD/$f" /var/lib/clickhouse/user_files/"$f"
+done
+sudo chown -h clickhouse:clickhouse /var/lib/clickhouse/user_files/hits_*.parquet
+
+clickhouse-client --query "INSERT INTO hits SELECT * FROM file('hits_*.parquet')" --max-insert-threads "$(( $(nproc) / 4 ))"
+
+sudo rm -f /var/lib/clickhouse/user_files/hits_*.parquet
+sync
diff --git a/clickhouse-i114640-z2/queries.sql b/clickhouse-i114640-z2/queries.sql
new file mode 100644
index 0000000000..31f65fc898
--- /dev/null
+++ b/clickhouse-i114640-z2/queries.sql
@@ -0,0 +1,43 @@
+SELECT COUNT(*) FROM hits;
+SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
+SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
+SELECT AVG(UserID) FROM hits;
+SELECT COUNT(DISTINCT UserID) FROM hits;
+SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
+SELECT MIN(EventDate), MAX(EventDate) FROM hits;
+SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
+SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
+SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
+SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
+SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
+SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
+SELECT UserID FROM hits WHERE UserID = 435090932899640449;
+SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
+SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
+SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
+SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
+SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
+SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
+SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
+SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
+SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
+SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
+SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
+SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
+SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
+SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;
diff --git a/clickhouse-i114640-z2/query b/clickhouse-i114640-z2/query
new file mode 100755
index 0000000000..6d5c47fb11
--- /dev/null
+++ b/clickhouse-i114640-z2/query
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Reads a SQL query from stdin, runs it via clickhouse-client.
+# Stdout: query result (default format).
+# Stderr: query runtime in fractional seconds on the last line (from --time).
+# Exit non-zero on error.
+set -e
+
+clickhouse-client --time --format=Pretty
diff --git a/clickhouse-i114640-z2/results/20260813/c7a.metal-48xl.json b/clickhouse-i114640-z2/results/20260813/c7a.metal-48xl.json
new file mode 100644
index 0000000000..53da1c7a54
--- /dev/null
+++ b/clickhouse-i114640-z2/results/20260813/c7a.metal-48xl.json
@@ -0,0 +1,60 @@
+{
+      "system": "ClickHouse (i114640 Z2 post-107490)",
+      "date": "2026-08-13",
+      "machine": "c7a.metal-48xl",
+      "cluster_size": 1,
+      "proprietary": "no",
+      "hardware": "cpu",
+      "tuned": "no",
+      "tags": ["C++","column-oriented","ClickHouse derivative"],
+      "load_time": 258,
+      "data_size": 15265055524,
+      "concurrent_qps": null,
+      "concurrent_error_ratio": null,
+      "result": [
+        [0.002, 0.001, 0.001],
+        [0.125, 0.011, 0.011],
+        [0.415, 0.014, 0.013],
+        [0.963, 0.023, 0.012],
+        [1.036, 0.076, 0.065],
+        [1.939, 0.094, 0.101],
+        [0.109, 0.01, 0.01],
+        [0.118, 0.018, 0.045],
+        [1.523, 0.249, 0.249],
+        [1.895, 0.243, 0.234],
+        [1.799, 0.429, 0.297],
+        [1.576, 0.277, 0.165],
+        [2.041, 0.101, 0.093],
+        [2.735, 0.138, 0.124],
+        [2.099, 0.103, 0.079],
+        [0.995, 0.064, 0.057],
+        [2.663, 0.157, 0.154],
+        [2.758, 0.137, 0.148],
+        [4.211, 0.273, 0.269],
+        [0.628, 0.003, 0.002],
+        [9.579, 0.047, 0.047],
+        [11.034, 0.024, 0.022],
+        [13.929, 0.075, 0.067],
+        [5.488, 0.078, 0.072],
+        [1.915, 0.161, 0.131],
+        [1.806, 0.037, 0.028],
+        [1.919, 0.739, 0.145],
+        [1.156, 0.027, 0.026],
+        [8.194, 0.714, 0.703],
+        [0.405, 0.063, 0.049],
+        [1.59, 0.072, 0.068],
+        [3.794, 0.089, 0.072],
+        [3.906, 0.504, 0.377],
+        [9.898, 0.327, 0.339],
+        [9.961, 0.358, 0.348],
+        [0.707, 0.057, 0.049],
+        [0.898, 0.084, 0.08],
+        [0.477, 0.051, 0.053],
+        [0.963, 0.026, 0.031],
+        [1.574, 0.178, 0.136],
+        [0.517, 0.02, 0.018],
+        [0.507, 0.014, 0.013],
+        [0.418, 0.031, 0.011]
+]
+  } 
+  
\ No newline at end of file
diff --git a/clickhouse-i114640-z2/start b/clickhouse-i114640-z2/start
new file mode 100755
index 0000000000..a3aa66fe75
--- /dev/null
+++ b/clickhouse-i114640-z2/start
@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+sudo clickhouse start
diff --git a/clickhouse-i114640-z2/stop b/clickhouse-i114640-z2/stop
new file mode 100755
index 0000000000..ea9d529c3e
--- /dev/null
+++ b/clickhouse-i114640-z2/stop
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo clickhouse stop || true
diff --git a/clickhouse-i114640-z2/template.json b/clickhouse-i114640-z2/template.json
new file mode 100644
index 0000000000..3c26405622
--- /dev/null
+++ b/clickhouse-i114640-z2/template.json
@@ -0,0 +1,11 @@
+{
+  "system": "ClickHouse (i114640 Z2 post-107490)",
+  "proprietary": "no",
+  "hardware": "cpu",
+  "tuned": "no",
+  "tags": [
+    "C++",
+    "column-oriented",
+    "ClickHouse derivative"
+  ]
+}