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statistics/handle: refine the condition of dumping stats delta (#41133) #41168

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This is an automated cherry-pick of #41133

What problem does this PR solve?

Issue Number: ref #38189 ref #36004 ref #39785

Problem Summary:

What is changed and how it works?

Refine the condition of dumping stats delta:

  1. If the table doesn't exist or is a mem table or system table, then return false.
  2. If the mode is DumpAll, then return true.
  3. If the stats delta haven't been dumped in the past hour, then return true.
  4. If the table stats is pseudo or empty or Modify Count / Table Count exceeds the threshold.

There are two changes(marked in bold):

  1. a mem table or system table: It can prevent the cases such as Continuously update the stats_meta of mysql.tidb in auto analyze loop #39785.
  2. pseudo: When we fail to create stats meta after creating a table, ddl, statistics: fix stats meta missing when creating many tables at once #38301 uses the dump stats delta procedure to fill in missing stats meta. However, in that case, the table's stats is pseudo and the old condition would refuse to dump stats delta. So we need the change to fill in missing stats meta completely.

Check List

Tests

  • Unit test
  • Integration test
  • Manual test (add detailed scripts or steps below)
  • No code

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.

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@ti-chi-bot ti-chi-bot added release-note-none Denotes a PR that doesn't merit a release note. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-6.5 This PR is cherry-picked to release-6.5 from a source PR. labels Feb 7, 2023
@ti-chi-bot ti-chi-bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Feb 7, 2023
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/hold high priority for trunk branch

@ti-chi-bot ti-chi-bot added the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label Feb 10, 2023
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/unhold

@ti-chi-bot ti-chi-bot removed the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label Feb 10, 2023
@ti-chi-bot ti-chi-bot bot deleted a comment from ti-chi-bot Jul 15, 2023
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Aug 10, 2023
@ti-chi-bot ti-chi-bot bot deleted a comment from ti-chi-bot Aug 10, 2023
@ti-chi-bot ti-chi-bot removed the cherry-pick-approved Cherry pick PR approved by release team. label Aug 17, 2023
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ti-chi-bot bot commented Aug 17, 2023

This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick, it must first be approved by the collaborators.

AFTER it has been approved by collaborators, please ping the release team in a comment to request a cherry pick review.

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@ti-chi-bot ti-chi-bot bot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Sep 8, 2023
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PR needs rebase.

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@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Dec 11, 2023
Signed-off-by: Weizhen Wang <[email protected]>
Signed-off-by: Weizhen Wang <[email protected]>
@hawkingrei hawkingrei force-pushed the cherry-pick-41133-to-release-6.5 branch from 40bc639 to 7b9ce97 Compare December 22, 2023 07:14
@ti-chi-bot ti-chi-bot bot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Dec 22, 2023
@ti-chi-bot ti-chi-bot bot added needs-1-more-lgtm Indicates a PR needs 1 more LGTM. approved labels Dec 22, 2023
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Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@13eeb6a). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files
@@               Coverage Diff                @@
##             release-6.5     #41168   +/-   ##
================================================
  Coverage               ?   73.9085%           
================================================
  Files                  ?       1087           
  Lines                  ?     351138           
  Branches               ?          0           
================================================
  Hits                   ?     259521           
  Misses                 ?      75127           
  Partials               ?      16490           

@ti-chi-bot ti-chi-bot bot added the lgtm label Dec 22, 2023
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ti-chi-bot bot commented Dec 22, 2023

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, qw4990

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@ti-chi-bot ti-chi-bot bot removed the needs-1-more-lgtm Indicates a PR needs 1 more LGTM. label Dec 22, 2023
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ti-chi-bot bot commented Dec 22, 2023

[LGTM Timeline notifier]

Timeline:

  • 2023-12-22 07:43:18.699072288 +0000 UTC m=+1206089.736299216: ☑️ agreed by qw4990.
  • 2023-12-22 08:28:09.874948128 +0000 UTC m=+1208780.912175040: ☑️ agreed by hawkingrei.

@hawkingrei hawkingrei removed the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Dec 22, 2023
@ti-chi-bot ti-chi-bot bot merged commit 8299b27 into pingcap:release-6.5 Dec 22, 2023
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