Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

infoschema: fix issue of information schema cache miss cause by schema version gap (#53445) #53584

Merged

Conversation

ti-chi-bot
Copy link
Member

This is an automated cherry-pick of #53445

What problem does this PR solve?

Issue Number: close #53428

Problem Summary: fix issue of information schema cache miss cause by schema version gap

What changed and how does it work?

before this PR

When DDL has empty schema version, will cause cache miss, then stale-read query need to load snapshot schema from TiKV.

image
[2024/05/23 06:15:10.546 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6760] [neededSchemaVersion=6762] ["start time"=2.583049ms] [gotSchemaVersion=6762] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:15:17.869 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6763] [neededSchemaVersion=6765] ["start time"=2.040666ms] [gotSchemaVersion=6765] [phyTblIDs="[10496]"] [actionTypes="[4]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:15:18.051 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6765] [neededSchemaVersion=6767] ["start time"=4.321375ms] [gotSchemaVersion=6767] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:15:18.245 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6767] [neededSchemaVersion=6769] ["start time"=3.01603ms] [gotSchemaVersion=6769] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]

This PR

When DDL has empty schema version, this PR won't have schema cache miss, then won't cause many load snapshot schema operation.

image
[2024/05/23 06:23:45.209 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6777] [neededSchemaVersion=6779] ["start time"=5.409896ms] [gotSchemaVersion=6779] [phyTblIDs="[10502]"] [actionTypes="[4]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:45.458 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6779] [neededSchemaVersion=6781] ["start time"=2.711853ms] [gotSchemaVersion=6781] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:45.650 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6781] [neededSchemaVersion=6783] ["start time"=1.910751ms] [gotSchemaVersion=6783] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:49.173 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6784] [neededSchemaVersion=6786] ["start time"=2.511772ms] [gotSchemaVersion=6786] [phyTblIDs="[10505]"] [actionTypes="[4]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:49.372 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6786] [neededSchemaVersion=6788] ["start time"=2.768253ms] [gotSchemaVersion=6788] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:49.590 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6788] [neededSchemaVersion=6790] ["start time"=4.466332ms] [gotSchemaVersion=6790] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:53.670 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6791] [neededSchemaVersion=6793] ["start time"=799.389µs] [gotSchemaVersion=6793] [phyTblIDs="[10508]"] [actionTypes="[4]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:53.872 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6793] [neededSchemaVersion=6795] ["start time"=1.025364ms] [gotSchemaVersion=6795] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]
[2024/05/23 06:23:54.090 +00:00] [INFO] [domain.go:287] ["diff load InfoSchema success"] [currentSchemaVersion=6795] [neededSchemaVersion=6797] ["start time"=3.549838ms] [gotSchemaVersion=6797] [phyTblIDs="[]"] [actionTypes="[]"] [diffTypes="[\"drop table\"]"]

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.

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

…a version gap

Signed-off-by: crazycs520 <crazycs520@gmail.com>
Signed-off-by: crazycs520 <crazycs520@gmail.com>
Signed-off-by: crazycs520 <crazycs520@gmail.com>
Signed-off-by: crazycs520 <crazycs520@gmail.com>
@ti-chi-bot ti-chi-bot added ok-to-test Indicates a PR is ready to be tested. release-note-none Denotes a PR that doesn't merit a release note. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR. labels May 27, 2024
Copy link

codecov bot commented May 27, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@945d07c). Learn more about missing BASE report.

Additional details and impacted files
@@               Coverage Diff                @@
##             release-8.1     #53584   +/-   ##
================================================
  Coverage               ?   71.2975%           
================================================
  Files                  ?       1465           
  Lines                  ?     422329           
  Branches               ?          0           
================================================
  Hits                   ?     301110           
  Misses                 ?     100762           
  Partials               ?      20457           
Flag Coverage Δ
unit 71.2975% <100.0000%> (?)

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

Components Coverage Δ
dumpling 53.9957% <0.0000%> (?)
parser ∅ <0.0000%> (?)
br 40.9772% <0.0000%> (?)

@ti-chi-bot ti-chi-bot bot added the needs-1-more-lgtm Indicates a PR needs 1 more LGTM. label May 27, 2024
@ti-chi-bot ti-chi-bot bot added lgtm and removed needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels May 28, 2024
Copy link

ti-chi-bot bot commented May 28, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-05-27 11:31:29.754317167 +0000 UTC m=+2689643.511452739: ☑️ agreed by crazycs520.
  • 2024-05-28 02:20:35.101541753 +0000 UTC m=+2742988.858677322: ☑️ agreed by tiancaiamao.

@ti-chi-bot ti-chi-bot bot added the approved label May 28, 2024
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Jun 5, 2024
@crazycs520
Copy link
Contributor

/merge

Copy link

ti-chi-bot bot commented Jun 5, 2024

@crazycs520: We have migrated to builtin LGTM and approve plugins for reviewing.

Please use /approve when you want approve this pull request.

The changes announcement: LGTM plugin changes

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

@crazycs520
Copy link
Contributor

/approve

Copy link

ti-chi-bot bot commented Jun 5, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: crazycs520, tiancaiamao, wjhuang2016

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

The pull request process is described here

Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

@ti-chi-bot ti-chi-bot bot merged commit 8dbe4e5 into pingcap:release-8.1 Jun 5, 2024
18 checks passed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
approved cherry-pick-approved Cherry pick PR approved by release team. lgtm ok-to-test Indicates a PR is ready to be tested. release-note-none Denotes a PR that doesn't merit a release note. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

4 participants