executor: reduce the length of channel to avoid OOM

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #47275

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

[codecov]

Codecov Report

Merging #47540 (c16fd69) into master (ec2731b) will increase coverage by 0.6037%.
Report is 8 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47540        +/-   ##
================================================
+ Coverage   72.1426%   72.7463%   +0.6037%     
================================================
  Files          1353       1374        +21     
  Lines        401327     409017      +7690     
================================================
+ Hits         289528     297545      +8017     
- Misses        92490      92744       +254     
+ Partials      19309      18728       -581     

Flag	Coverage Δ
integration	40.4338% <100.0000%> (?)
unit	72.0385% <100.0000%> (-0.1042%)	⬇️

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	84.7077% <ø> (+0.0107%)	⬆️
br	48.8758% <ø> (-4.3196%)	⬇️

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-11 06:35:50.282711251 +0000 UTC m=+1206947.869821396: ☑️ agreed by winoros.
• 2023-10-11 07:24:20.29190279 +0000 UTC m=+1209857.879012936: ☑️ agreed by qw4990.

[hawkingrei]

/retest

[elsa0520]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elsa0520, qw4990, winoros

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