Skip to content

Conversation

@ti-chi-bot
Copy link
Member

This is an automated cherry-pick of #22273

First-time contributors' checklist

What is changed, added or deleted? (Required)

Which TiDB version(s) do your changes apply to? (Required)

After tikv/tikv#18806, the default settings to server.grpc-concurrency and server.grpc-raft-conn-num has been modified, which is adaptive to the CPU cores by default.

This PR is introduced to update the descriptions to these two configurations.

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions (in Chinese).

  • master (the latest development version)
  • v9.0 (TiDB 9.0 versions)
  • v8.5 (TiDB 8.5 versions)
  • v8.1 (TiDB 8.1 versions)
  • v7.5 (TiDB 7.5 versions)
  • v7.1 (TiDB 7.1 versions)
  • v6.5 (TiDB 6.5 versions)
  • v6.1 (TiDB 6.1 versions)
  • v5.4 (TiDB 5.4 versions)

What is the related PR or file link(s)?

Do your changes match any of the following descriptions?

  • Delete files
  • Change aliases
  • Need modification after applied to another branch
  • Might cause conflicts after applied to another branch

@ti-chi-bot ti-chi-bot added lgtm needs-1-more-lgtm Indicates a PR needs 1 more LGTM. needs-ok-to-test Indicates a PR created by contributors and need ORG member send '/ok-to-test' to start testing. size/S Denotes a PR that changes 10-29 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 12, 2026
@gemini-code-assist
Copy link

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 focuses on updating the TiKV documentation to accurately reflect recent changes in the default settings for server.grpc-concurrency and server.grpc-raft-conn-num. The core purpose is to ensure that users have the most current and correct information regarding these critical gRPC-related configuration parameters, which now adapt their default values based on the system's CPU core count in newer TiKV versions. This improves the accuracy and relevance of the documentation for optimal TiKV performance tuning.

Highlights

  • Updated Default Configuration Values: The documentation for server.grpc-concurrency and server.grpc-raft-conn-num has been updated to reflect their new adaptive default values in TiKV versions v8.5.4 and v9.0.0 onwards. These defaults are now calculated based on CPU cores, replacing previous fixed values.
  • Clarified grpc-concurrency Calculation: The default value for server.grpc-concurrency is now explicitly stated as grpc-raft-conn-num * 3 + 2 in newer versions, with an example provided for clarity.
  • Clarified grpc-raft-conn-num Calculation: The default value for server.grpc-raft-conn-num is now explicitly stated as MAX(1, MIN(4, CPU cores / 8)) in newer versions, indicating an adaptive approach based on CPU core count.
  • Documentation Consistency: Various best practices and tuning guides have been updated to remove outdated default values and refer to the main configuration file for the most current information on these parameters.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature Command Description
Code Review /gemini review Performs a code review for the current pull request in its current state.
Pull Request Summary /gemini summary Provides a summary of the current pull request in its current state.
Comment @gemini-code-assist Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help /gemini help Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

  1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution.

Copy link

@gemini-code-assist gemini-code-assist bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Code Review

This pull request updates the documentation to reflect the new adaptive default values for server.grpc-concurrency and server.grpc-raft-conn-num. The changes are accurate and improve the documentation across several files. I have one suggestion to improve the clarity of the formula explanation for grpc-raft-conn-num.

@qiancai qiancai changed the title tikv: update default settings of server.grpc-concurrency and server.grpc-raft-conn-num. (#22273) v8.5.4 tikv: update default settings of server.grpc-concurrency and server.grpc-raft-conn-num. (#22273) Jan 12, 2026
@qiancai
Copy link
Collaborator

qiancai commented Jan 12, 2026

/approve

@ti-chi-bot
Copy link

ti-chi-bot bot commented Jan 12, 2026

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiancai

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

@ti-chi-bot ti-chi-bot bot added the approved label Jan 12, 2026
@ti-chi-bot ti-chi-bot bot merged commit 84082ae into pingcap:release-8.5 Jan 12, 2026
9 checks passed
@ti-chi-bot ti-chi-bot bot deleted the cherry-pick-22273-to-release-8.5 branch January 12, 2026 07:11
breezewish added a commit that referenced this pull request Jan 13, 2026
* origin/release-8.5: (48 commits)
  Terraform: remove `cluster_id` in `cluster_id, vpc_peering_id` (#22318)
  Update the Compatibility changes of release-8.5.4 (#22233) (#22316)
  cloud: optimize the description of TiDB-X features (#22294)
  Add FORMAT keyword to import statement options (#22301) (#22304)
  cloud: delete disaster recovery (#22299)
  v8.5.4 tikv: update default settings of `server.grpc-concurrency` and `server.grpc-raft-conn-num`. (#22273) (#22298)
  Update create-tidb-instance-premium.md (#22288)
  sync-diff-inspector: add PROCESS permission when upstream and downstream are TiDB (#22289) (#22292)
  sql-faq: fix outdated description about JDBC (#22283) (#22287)
  master, v8.5: update download URL from pingcap.org to pingcap.com (#22240) (#22280)
  tikv: fix the default value of `end-point-memory-quota` (#22271) (#22272)
  v8.5.4: tikv: update auto compaction config (#22251) (#22265)
  pdf: update year to 2026 in copyright.tex (#22253) (#22260)
  v8.5.4 tikv: update rocksdb.max-manifest-file-size default value (#21689) (#22250)
  tidb-cloud: update the RU definition (#22197)
  cloud: update backup policies and execution rules (#22227)
  cloud: add release notes for 20251230 (#22247)
  cloud: add private link connection docs for overview and Confluent (#22246)
  tiproxy: add tiproxy usage in the tidb cloud doc (#21483)
  cloud: update the retention note for the latest automatic backup (#22248)
  ...
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

approved lgtm needs-1-more-lgtm Indicates a PR needs 1 more LGTM. needs-ok-to-test Indicates a PR created by contributors and need ORG member send '/ok-to-test' to start testing. size/S Denotes a PR that changes 10-29 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.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants