planner: add metrics for instance plan cache eviction

[qw4990]

What problem does this PR solve?

Issue Number: ref #54057

Problem Summary: planner: add metrics for instance plan cache eviction

What changed and how does it work?

planner: add metrics for instance plan cache eviction

Check List

Tests

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

  • I checked and no code files have been changed.

Side effects

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

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @qw4990. Thanks for your PR.

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-12 08:48:39.885973599 +0000 UTC m=+171404.589443243: ☑️ agreed by hawkingrei.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 75.3087%. Comparing base (89bb81b) to head (73253fd).
Report is 3 commits behind head on master.

❗ Current head 73253fd differs from pull request most recent head 866c915

Please upload reports for the commit 866c915 to get more accurate results.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #55367        +/-   ##
================================================
+ Coverage   74.7608%   75.3087%   +0.5479%     
================================================
  Files          1576       1580         +4     
  Lines        365527     441622     +76095     
================================================
+ Hits         273271     332580     +59309     
- Misses        72453      88440     +15987     
- Partials      19803      20602       +799     

Flag	Coverage Δ
integration	50.2096% <45.0000%> (?)
unit	71.8491% <87.5000%> (-1.8719%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.9567% <ø> (-2.2327%)	⬇️
parser	∅ <ø> (∅)
br	62.2205% <ø> (+14.5634%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: hawkingrei
Once this PR has been reviewed and has the lgtm label, please assign easonn7, lance6716 for approval, ensuring that each of them provides their approval before proceeding. For more information see the Code Review Process.

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

Needs approval from an approver in each of these files:

• OWNERS [hawkingrei]
• pkg/domain/OWNERS
• pkg/planner/OWNERS [hawkingrei]
• pkg/sessionctx/variable/OWNERS

Approvers can indicate their approval by writing /approve in a comment
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[ti-chi-bot]

PR needs rebase.

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[ti-chi-bot]

@qw4990: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/unit-test	866c915	link	true	/test unit-test
idc-jenkins-ci-tidb/mysql-test	866c915	link	true	/test mysql-test
idc-jenkins-ci-tidb/build	866c915	link	true	/test build
pull-br-integration-test	866c915	link	true	/test pull-br-integration-test
pull-integration-ddl-test	866c915	link	true	/test pull-integration-ddl-test
idc-jenkins-ci-tidb/check_dev	866c915	link	true	/test check-dev
idc-jenkins-ci-tidb/check_dev_2	866c915	link	true	/test check-dev2
pull-mysql-client-test	866c915	link	true	/test pull-mysql-client-test
pull-lightning-integration-test	866c915	link	true	/test pull-lightning-integration-test

Full PR test history. Your PR dashboard.

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