ttl, domain: setup a customized session pool with stats collector (#40171)

[ti-chi-bot]

This is an automated cherry-pick of #40171

Signed-off-by: YangKeao yangkeao@chunibyo.icu

What problem does this PR solve?

Issue Number: close #40109

Problem Summary:

The table stats are not updated after ttl job.

What is changed and how it works?

Construct a new session pool with stats collector attached.

The do.sysSessionPool cannot have stats collector attached, because the stats handler are also using the session in this session pool, which obviously should not be collected (or it will result in endless recursive).

Check List

Tests

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

Release note

Fix the issue that ttl deletion is not recorded in the statistics information.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lcwangchao

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[YangKeao]

LGTM

[YangKeao]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcwangchao, YangKeao

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• OWNERS [YangKeao,lcwangchao]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-17 03:16:11.554244447 +0000 UTC m=+773736.103260434: ☑️ agreed by YangKeao.
• 2023-08-17 03:22:16.122295579 +0000 UTC m=+774100.671311566: ☑️ agreed by lcwangchao.

[YangKeao]

/retest

[YangKeao]

/retest

[YangKeao]

/retest

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@706c3fa). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #40233   +/-   ##
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  Coverage               ?   73.6745%           
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  Files                  ?       1084           
  Lines                  ?     347857           
  Branches               ?          0           
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  Hits                   ?     256282           
  Misses                 ?      75118           
  Partials               ?      16457           

[ti-chi-bot]

@ti-chi-bot: 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
idc-jenkins-ci-tidb/mysql-test	8239759	link	unknown	/test mysql-test

Full PR test history. Your PR dashboard.

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[YangKeao]

/retest