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Storages: Fix statistical data of DMFilePackFilter #9254

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merged 2 commits into from
Jul 25, 2024

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JinheLin
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What problem does this PR solve?

Issue Number: ref #9103

Problem Summary:

In table scanning, DMFilePackFilter of a DMFile may be created several times:

  1. When building MVCC bitmap (ReadTag::MVCC).
  2. When building LM filter stream (ReadTag::LM).
  3. When building stream of other columns (ReadTag::Query).

Only need to count the filter result once.

What is changed and how it works?


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

None

@ti-chi-bot ti-chi-bot 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. labels Jul 24, 2024
@ti-chi-bot ti-chi-bot bot added needs-1-more-lgtm Indicates a PR needs 1 more LGTM. approved labels Jul 25, 2024
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ti-chi-bot bot commented Jul 25, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JaySon-Huang, Lloyd-Pottiger

The full list of commands accepted by this bot can be found here.

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  • OWNERS [JaySon-Huang,Lloyd-Pottiger]

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@ti-chi-bot ti-chi-bot bot added lgtm and removed needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels Jul 25, 2024
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ti-chi-bot bot commented Jul 25, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-07-25 04:46:47.608621567 +0000 UTC m=+1106829.599563034: ☑️ agreed by JaySon-Huang.
  • 2024-07-25 07:22:31.863013076 +0000 UTC m=+1116173.853954541: ☑️ agreed by Lloyd-Pottiger.

@ti-chi-bot ti-chi-bot bot merged commit a4f0ec6 into pingcap:master Jul 25, 2024
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3 participants