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This is an automated cherry-pick of #22198

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What is changed, added or deleted? (Required)

ref pingcap/tidb#64994

Updated the default value of tidb_analyze_column_options to ALL.

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0xPoe and others added 4 commits January 13, 2026 03:37
@ti-chi-bot ti-chi-bot added lgtm needs-1-more-lgtm Indicates a PR needs 1 more LGTM. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. type/cherry-pick-for-release-8.5 This PR is cherry-picked to release-8.5 from a source PR. v9.0-beta.3 This PR/issue applies to TiDB v9.0-beta.3. labels Jan 13, 2026
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Summary of Changes

Hello @ti-chi-bot, 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 default behavior of the tidb_analyze_column_options system variable to ALL for recent and future TiDB versions. This change ensures that statistics are collected for all columns by default, which can lead to more optimal query execution plans. The associated documentation has been revised to accurately reflect this new default and remove outdated warnings, streamlining the configuration process for users.

Highlights

  • Default Value Change: The default value for the tidb_analyze_column_options system variable has been updated from PREDICATE to ALL for newly deployed TiDB clusters from v8.5.5 and v9.0.0 onwards.
  • Documentation Update: The documentation for tidb_analyze_column_options in system-variables.md has been clarified to reflect the default value changes across different TiDB versions.
  • Performance Tuning Guide Refinement: The tidb-performance-tuning-config.md file has been updated to remove a previous warning about increased resource usage when tidb_analyze_column_options is set to ALL, indicating that this is now the recommended default behavior.

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Code Review

This pull request updates the default value of tidb_analyze_column_options to ALL and adjusts the documentation accordingly. The changes are generally good, but I have a couple of suggestions to improve the clarity and completeness of the documentation for better user understanding.

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qiancai commented Jan 19, 2026

/approve

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ti-chi-bot bot commented Jan 19, 2026

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiancai

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@ti-chi-bot ti-chi-bot bot added the approved label Jan 19, 2026
@qiancai qiancai assigned qiancai and unassigned 0xPoe Jan 19, 2026
@ti-chi-bot ti-chi-bot bot merged commit dbb3f0d into pingcap:release-8.5 Jan 19, 2026
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@ti-chi-bot ti-chi-bot bot deleted the cherry-pick-22198-to-release-8.5 branch January 19, 2026 02:33
@qiancai qiancai changed the title tidb: update the default value of tidb_analyze_column_options (#22198) v8.5.5 tidb: update the default value of tidb_analyze_column_options (#22198) Jan 19, 2026
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approved lgtm needs-1-more-lgtm Indicates a PR needs 1 more LGTM. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. type/cherry-pick-for-release-8.5 This PR is cherry-picked to release-8.5 from a source PR. v9.0-beta.3 This PR/issue applies to TiDB v9.0-beta.3.

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3 participants