sys-var: increase max value for innodb_lock_wait_timeout

[dveeden]

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pingcap/tidb#65153

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[gemini-code-assist]

Summary of Changes

Hello @dveeden, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the documentation for the innodb_lock_wait_timeout system variable. The primary goal is to reflect a recent change in the TiDB codebase that expanded the maximum allowable value for this timeout. By updating the range in the system-variables.md file, users will have accurate information regarding the extended configuration options for pessimistic transaction lock wait times.

Highlights

• Documentation Update: The documentation for the innodb_lock_wait_timeout system variable has been updated to reflect recent changes.
• Increased Max Value: The maximum configurable value for innodb_lock_wait_timeout has been significantly increased from 3600 seconds to 1073741824 seconds.
• Version Applicability: These documentation changes apply to the master branch and the v9.0 release of TiDB.

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[gemini-code-assist]

Summary of Changes

Hello @dveeden, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the documentation for the innodb_lock_wait_timeout system variable. The change reflects an expanded maximum value for this timeout, allowing users to configure much longer lock wait periods for pessimistic transactions. This ensures the documentation accurately represents the current capabilities of the system.

Highlights

• Documentation Update: The maximum configurable value for the innodb_lock_wait_timeout system variable has been updated in the documentation.
• Increased Range: The Range for innodb_lock_wait_timeout is now documented as [1, 1073741824] seconds, significantly increasing its previous maximum of 3600 seconds.

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[gemini-code-assist]

Code Review

This pull request correctly updates the maximum value for the innodb_lock_wait_timeout system variable to align with MySQL. I have also suggested a minor improvement to the variable's description to enhance clarity for users.

[mjonss]

LGTM

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[LGTM Timeline notifier]

Timeline:

• 2026-04-10 12:33:50.937248792 +0000 UTC m=+1132436.142608849: ☑️ agreed by qiancai.

[hfxsd]

/approve

[hfxsd]

/retest

[hfxsd]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hfxsd

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