executor, indexusage: don't load stats for point get index usage reporter

[YangKeao]

What problem does this PR solve?

Issue Number: close #58477

Problem Summary:

As described in the issue, maybe load stats is too slow for point get requests.

What changed and how does it work?

1. Don't load stats for point get requests.

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.

It has been covered by existing tests.

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

[YangKeao]

TODO: performance test

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from yangkeao, 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

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5549%. Comparing base (91706ec) to head (d3e7296).
Report is 2 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58478        +/-   ##
================================================
+ Coverage   73.1476%   73.5549%   +0.4072%     
================================================
  Files          1678       1678                
  Lines        464086     464188       +102     
================================================
+ Hits         339468     341433      +1965     
+ Misses       103772     101917      -1855     
+ Partials      20846      20838         -8     

Flag	Coverage Δ
integration	42.9381% <45.4545%> (?)
unit	72.3307% <100.0000%> (-0.0093%)	⬇️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.6939% <ø> (-0.0450%)	⬇️

[YangKeao]

The automatic test doesn't give a good result 🤔 . Maybe the improvement is not that significant (or the benchmark platform may have too big variation).

VERSION	QPS	LATENCY (P99)
8.5.0-no-point-stats-index-usage	121897	1.93
8.5.0-with-index-usage	122203	2.08
8.5.0-disable-index-usage-report	1.91

Theoretically, this PR should never hurt performance. I'll try to do the benchmark manually to make sure there is nothing wrong 🤔 .

[YangKeao]

A new benchmark result:

I'll do another benchmark, and see the profile.