pd: fix wrong description about inspect-network-interval

[hfxsd]

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• This PR is translated from:pd: fix wrong description about inspect-network-interval docs-cn#21330
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[gemini-code-assist]

Summary of Changes

Hello @hfxsd, 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 addresses an inaccuracy in the documentation regarding the default state of slow-network node detection and scheduling within TiDB's PD component. It rectifies the information to correctly state that the feature is enabled by default and provides clearer guidance on how adjusting the inspect-network-interval parameter impacts system resources and detection speed.

Highlights

• Documentation Correction: Corrected the documentation for slow-network node detection and scheduling, clarifying that this feature is enabled by default, not disabled.
• Configuration Clarification: Updated the description for raftstore.inspect-network-interval to explain that a smaller value increases detection frequency but also consumes more network bandwidth and CPU resources.

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Changelog

• pd-control.md
  • Updated the introductory sentence for slow-network node detection to reflect that it is enabled by default.
  • Revised the explanation for raftstore.inspect-network-interval to detail the trade-offs between detection frequency and resource consumption.

Activity

• The author, hfxsd, has signed the Contributor License Agreement.
• The changes in this PR are applicable to the master branch and v8.5 versions.
• This pull request is a translation from pingcap/docs-cn/pull/21330.
• No human activity (comments, reviews) has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request corrects the description for slow-network node detection and scheduling. The change clarifies that network detection is enabled by default on TiKV and provides better guidance on tuning the inspect-network-interval parameter. I've suggested a small wording change to improve the clarity of the introductory sentence, which currently seems to contradict one of the configuration steps.

[ti-chi-bot]

@okJiang: adding LGTM is restricted to approvers and reviewers in OWNERS files.

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[qiancai]

Rest LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-02-06 09:40:42.21479261 +0000 UTC m=+886.181969476: ☑️ agreed by qiancai.

[hfxsd]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hfxsd

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #22421.
But this PR has conflicts, please resolve them!