ddl: use memory available as the memory limit for add index

[GMHDBJD]

What problem does this PR solve?

Issue Number: ref #47757

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  add index, check the log
• 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 @GMHDBJD. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

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[codecov]

Codecov Report

Merging #48268 (1c5c41e) into master (0172ba0) will increase coverage by 4.4936%.
Report is 155 commits behind head on master.
The diff coverage is 0.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #48268        +/-   ##
================================================
+ Coverage   71.4846%   75.9783%   +4.4936%     
================================================
  Files          1402       1442        +40     
  Lines        406266     446155     +39889     
================================================
+ Hits         290418     338981     +48563     
+ Misses        96008      88706      -7302     
+ Partials      19840      18468      -1372     

Flag	Coverage Δ
integration	47.5438% <0.0000%> (?)
unit	74.6727% <0.0000%> (+3.1880%)	⬆️

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

Components	Coverage Δ
dumpling	54.1220% <ø> (+0.1345%)	⬆️
parser	∅ <ø> (∅)
br	49.7814% <ø> (-3.1462%)	⬇️

[GMHDBJD]

/retest

[tiprow]

@GMHDBJD: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[tangenta]

Suggested change

	logutil.BgLogger().Info("build operators that write index to cloud storage", zap.Uint64("memory total", memTotal), zap.Uint64("memory used", memUsed), zap.Uint64("memory available", memAvailable))
	logutil.BgLogger().Info("build operators that write index to cloud storage", zap.Uint64("memory total", memTotal), zap.Uint64("memory used", memUsed), zap.Uint64("buffer size", memSize))

[zimulala]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, zimulala

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• pkg/ddl/OWNERS [tangenta,zimulala]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-03 08:07:33.636607144 +0000 UTC m=+3199651.223717274: ☑️ agreed by tangenta.
• 2023-11-13 02:20:11.787282338 +0000 UTC m=+4042809.374392483: ☑️ agreed by zimulala.

[hawkingrei]

/retest

[hawkingrei]

/retest

[hawkingrei]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #48818.