statistics: support resource control for stats

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #44517

Problem Summary:

What is changed and how it works?

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

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[codecov]

Codecov Report

Merging #48618 (c953cfe) into master (1c8d383) will increase coverage by 11.7130%.
Report is 893 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #48618         +/-   ##
=================================================
+ Coverage   71.4240%   83.1370%   +11.7130%     
=================================================
  Files          1404       2563       +1159     
  Lines        407213     749882     +342669     
=================================================
+ Hits         290848     623430     +332582     
- Misses        96412     104194       +7782     
- Partials      19953      22258       +2305     

Flag	Coverage Δ
integration	28.0045% <100.0000%> (?)
unit	82.2601% <100.0000%> (+10.8360%)	⬆️

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

Components	Coverage Δ
dumpling	73.6721% <ø> (+19.6846%)	⬆️
parser	∅ <ø> (∅)
br	72.2661% <ø> (+19.1806%)	⬆️

[nolouch]

Is it possible to get sessionvar from other internal SQLs, like from ddl module?

[hawkingrei]

/test all

[hawkingrei]

/test all

[tiprow]

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

Test name	Commit	Details	Required	Rerun command
tiprow_fast_test	c953cfe	link	true	/test tiprow_fast_test

Full PR test history. Your PR dashboard.

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[ti-chi-bot]

@hawkingrei: 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/build	c953cfe	link	true	/test build
idc-jenkins-ci-tidb/check_dev	c953cfe	link	true	/test check-dev

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.