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Modify the introduction of cop_pool_size (#21462) #21627

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This is an automated cherry-pick of #21462

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@ti-chi-bot ti-chi-bot added area/bigdata Indicates that the Issue or PR belongs to the area of TiFlash, TiSpark, and OLAP. 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. type/enhancement The issue or PR belongs to an enhancement. labels Aug 21, 2025
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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 clarifies the documentation for the cop_pool_size parameter within TiFlash configuration. The update provides more precise details on how TiFlash handles concurrent requests when they exceed the configured limit, specifically differentiating between queuing and rejection based on the magnitude of the overload. This enhancement improves the accuracy and completeness of the configuration guide.

Highlights

  • Documentation Update for cop_pool_size: The description for the cop_pool_size parameter in tiflash-configuration.md has been updated.
  • Clarification on Request Handling Beyond Limit: The updated description now explicitly states that when the number of requests exceeds 10 times the cop_pool_size value, the exceeded requests will be rejected by TiFlash. Previously, it only mentioned queuing for exceeded requests.
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Code Review

This pull request updates the documentation for the cop_pool_size configuration parameter in TiFlash to provide more detail on how request queuing and rejection are handled. My review focuses on improving the clarity and adherence to the documentation style guide. I've suggested a change to use active voice and second-person perspective, which makes the description more direct and easier for users to understand.

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qiancai commented Aug 21, 2025

/approve

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ti-chi-bot bot commented Aug 21, 2025

[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 Aug 21, 2025
@ti-chi-bot ti-chi-bot bot merged commit e4cba71 into pingcap:release-8.5 Aug 21, 2025
8 of 9 checks passed
@ti-chi-bot ti-chi-bot bot deleted the cherry-pick-21462-to-release-8.5 branch August 21, 2025 09:11
breezewish added a commit that referenced this pull request Aug 21, 2025
…auto-embed

* commit 'b570cc86270ba2e2b2b71d6eab8d717c2c8a1c56': (48 commits)
  *: remove TiDB roadmap from TOC, home, index, add warning (#21628) (#21637)
  Update the scope of system-variable ”tidb_redact_log“ (#21513) (#21634)
  *: add custom Japanese localization for cloud docs (#21612)
  Modify the introduction of `cop_pool_size` (#21462) (#21627)
  tiflash: Update tiflash upgrade guide (#21619) (#21625)
  Update tidb-performance-tuning-config.md (#21621) (#21624)
  Update tidb-cloud-poc.md (#21336) (#21411)
  cloud: update the pricing link for starter  (#21620)
  ticdc: clarify descriptions of `index-value` and `columns` (#21616) (#21617)
  release-8.5: remove 'v' prefix from tidb-version variable (#21614)
  release-8.5: update version to 8.5.3 (#21613)
  cloud: fix note annotation syntax for proper rendering (#21611)
  ticdc: add key word for redo log (#21564) (#21607)
  ticdc: correct the tiup cluster command (#21135) (#21608)
  bump TiDB from v8.5.2 to v8.5.3 (#21578)
  v8.5.3: add release notes (#21399) (#21606)
  v8.5.3: log backup: update metafile format (#21412) (#21577)
  v8.5.3: update telemetry related doc files (#21404) (#21603)
  system-variables: add optimizer cost factors (#20748) (#21602)
  Add more description about SHARD_ROW_ID_BITS (#21467) (#21600)
  ...
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3 participants