copr: add ballast mem to reduce the runtime overhead during execution (#53407)

[ti-chi-bot]

This is an automated cherry-pick of #53407

What problem does this PR solve?

Issue Number: ref #52887, #51852

Problem Summary:

What changed and how does it work?

Add a ballast memory in coprocessor, this can reduce the morestack call during coprocessor worker execution, lower the latency.

This is not the final solution for the referenced issues, it's just a hotfix, we need to manage the goroutine better to achieve both latency and throughput.

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.

Test with sysbench

workload	nightly	this pr	diff
select_random_points	19714 qps	20599 qps	+4.5%
select_random_ranges	18754 qps	19207 qps	+2.4%

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cfzjywxk, hawkingrei

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-05-21 03:08:16.723492259 +0000 UTC m=+2141050.480627832: ☑️ agreed by hawkingrei.
• 2024-05-21 03:23:08.765847191 +0000 UTC m=+2141942.522982764: ☑️ agreed by cfzjywxk.

[cfzjywxk]

/merge

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@9e5c591). Learn more about missing BASE report.

Additional details and impacted files

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