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) #53562

Conversation

crazycs520
Copy link
Contributor

@crazycs520 crazycs520 commented May 27, 2024

Cherry-pick #53445 #47810

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

Copy link

ti-chi-bot bot commented May 27, 2024

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

@ti-chi-bot ti-chi-bot bot added release-note-none Denotes a PR that doesn't merit a release note. do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels May 27, 2024
Copy link

tiprow bot commented May 27, 2024

Hi @crazycs520. 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.

I understand the commands that are listed here.

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 kubernetes-sigs/prow repository.

@crazycs520 crazycs520 marked this pull request as ready for review May 27, 2024 05:52
@ti-chi-bot ti-chi-bot bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label May 27, 2024
@crazycs520
Copy link
Contributor Author

@lcwangchao @wjhuang2016 PTAL

Signed-off-by: crazycs520 <[email protected]>
@crazycs520
Copy link
Contributor Author

/retest-required

Copy link

tiprow bot commented May 27, 2024

@crazycs520: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest-required

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 kubernetes-sigs/prow repository.

@ti-chi-bot ti-chi-bot bot added needs-1-more-lgtm Indicates a PR needs 1 more LGTM. approved labels 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 27, 2024
Copy link

ti-chi-bot bot commented May 27, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-05-27 07:38:31.584729885 +0000 UTC m=+2675665.341865459: ☑️ agreed by lcwangchao.
  • 2024-05-27 07:38:47.059609228 +0000 UTC m=+2675680.816744801: ☑️ agreed by tiancaiamao.

Copy link

ti-chi-bot bot commented May 27, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcwangchao, 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:
  • OWNERS [lcwangchao,tiancaiamao,wjhuang2016]

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

Signed-off-by: crazycs520 <[email protected]>
Signed-off-by: crazycs520 <[email protected]>
@crazycs520
Copy link
Contributor Author

/retest-required

Copy link

tiprow bot commented May 27, 2024

@crazycs520: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest-required

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 kubernetes-sigs/prow repository.

@crazycs520
Copy link
Contributor Author

/retest-required

Copy link

tiprow bot commented May 27, 2024

@crazycs520: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest-required

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 kubernetes-sigs/prow repository.

Copy link

ti-chi-bot bot commented May 27, 2024

@crazycs520: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
idc-jenkins-ci-tidb/build 984c0f2 link true /test build
idc-jenkins-ci-tidb/unit-test 984c0f2 link true /test unit-test
idc-jenkins-ci-tidb/mysql-test 984c0f2 link true /test mysql-test

Full PR test history. Your PR dashboard.

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 kubernetes/test-infra repository. I understand the commands that are listed here.

@crazycs520 crazycs520 merged commit a62856d into pingcap:tidb-6.5-with-kv-timeout-feature May 28, 2024
3 of 7 checks passed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
approved lgtm 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.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

4 participants