Cherry-pick #404 to release-8.1

[CalvinNeo]

cherry-pick of #404

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What is changed and how it works?

Issue Number: Close #xxx

What's Changed:

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Release note

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: JaySon-Huang

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[CalvinNeo]

/retest