log backup: set a proper maxVersion to resolve lock

[3pointer]

What problem does this PR solve?

Issue Number: close #57134

Problem Summary:

1. See issue.

What changed and how does it work?

To minimize the risk of lock conflicts, set the maxVersion to be the largest existing version value across all slow regions, incremented by 1. This adjustment helps optimize RPO by proactively reducing lock contention.

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 @3pointer. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.8203%. Comparing base (87669fb) to head (7e8d4c4).
Report is 22 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57178        +/-   ##
================================================
+ Coverage   73.0633%   74.8203%   +1.7569%     
================================================
  Files          1659       1705        +46     
  Lines        458027     468795     +10768     
================================================
+ Hits         334650     350754     +16104     
+ Misses       102843      96141      -6702     
- Partials      20534      21900      +1366     

Flag	Coverage Δ
integration	49.3121% <0.0000%> (?)
unit	72.3731% <100.0000%> (+0.0365%)	⬆️

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

Components	Coverage Δ
dumpling	52.7673% <ø> (-0.1806%)	⬇️
parser	∅ <ø> (∅)
br	61.0989% <100.0000%> (+15.3786%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BornChanger, YuJuncen

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-07 02:45:48.07396117 +0000 UTC m=+1095460.913116709: ☑️ agreed by YuJuncen.
• 2024-11-11 01:54:42.631941205 +0000 UTC m=+234844.822810198: ☑️ agreed by BornChanger.

[BornChanger]

/retest

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@3pointer: You cannot manually add or delete the cherry pick branch category labels. It will be added automatically by bot when the PR is created.

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #57278.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #57279.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #57280.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #57281.