*: speed up create table and reduce memory usage when the number of tables is relatively large

[zimulala]

What problem does this PR solve?

Issue Number: close #49370

Problem Summary:
ListTables took a lot of time when the number of tables was relatively large

What changed and how does it work?

Because the unmarshal of the TableInfo structure takes a large proportion of time, we only needn't all structures of the TableInfo. So we use TableNameInfo instead of it.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

Memory usage
Before this PR, when the 113k table is created, TiDB OOM (14G+) appears.
After this PR, the maximum memory of TiDB is nearly 6.9G when creating 113k tables, and the maximum memory usage is 11G when 400k tables are created

Time taken
Execute checkTableNotExistsFromStore function consumption of time.

Total Table Count	Current DB Table Count	Master Branch Take Time	After this PR Table Time
437k	215k	23-26s	12-14s

Master branch info:

After this PR info(The middle area is particularly high because the owner of another service is transferred):

• 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 @zimulala. Thanks for your PR.

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[codecov]

Codecov Report

Merging #49371 (56410e3) into master (9e34417) will increase coverage by 0.5482%.
Report is 42 commits behind head on master.
The diff coverage is 60.8695%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #49371        +/-   ##
================================================
+ Coverage   71.0590%   71.6073%   +0.5482%     
================================================
  Files          1368       1417        +49     
  Lines        401946     424599     +22653     
================================================
+ Hits         285619     304044     +18425     
- Misses        96463     101586      +5123     
+ Partials      19864      18969       -895     

Flag	Coverage Δ
integration	44.3091% <60.8695%> (?)
unit	71.0589% <ø> (-0.0001%)	⬇️

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

Components	Coverage Δ
dumpling	53.9663% <ø> (ø)
parser	∅ <ø> (∅)
br	47.2682% <ø> (-5.6933%)	⬇️

[lance6716]

12-14s is still not good enough IMO 🤔 Can you leave the issue open? Maybe others can try different solutions for it.

[zimulala]

12-14s is still not good enough IMO 🤔 Can you leave the issue open? Maybe others can try different solutions for it.

This is a solution with relatively small changes and relatively large benefits. As for the other possible optimizations, they are more complex (the root cause may be JSON unmarshal problems) and may not have a good solution in the short term. Subsequent optimization may be more like #19177.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-12 09:50:40.590817187 +0000 UTC m=+349731.628044116: ☑️ agreed by lance6716.
• 2023-12-13 02:33:43.971681022 +0000 UTC m=+409915.008907949: ☑️ agreed by tiancaiamao.

[zimulala]

/rebuild

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: crazycs520, Defined2014, lance6716, okJiang, tangenta, tiancaiamao

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[zimulala]

/retest-required

[tiprow]

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

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/retest-required

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #53545.