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docs: Add rfc for compact table via sql#4929

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ti-chi-bot merged 2 commits intomasterfrom
wenxuan/rfc/compact
May 30, 2022
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docs: Add rfc for compact table via sql#4929
ti-chi-bot merged 2 commits intomasterfrom
wenxuan/rfc/compact

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@breezewish breezewish commented May 19, 2022

What problem does this PR solve?

Issue Number: ref #4897

Problem Summary:

What is changed and how it works?

Add a RFC for the compact table via SQL feature.

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

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None

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ti-chi-bot commented May 19, 2022 •
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • JaySon-Huang
  • lidezhu

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
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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/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels May 19, 2022
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breezewish commented May 23, 2022

@lidezhu @JaySon-Huang @flowbehappy Hi, this RFC is not urgent. Please take a look when you are free. Thanks!

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lidezhu approved these changes May 24, 2022
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LGTM

@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label May 24, 2022
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sre-bot commented May 26, 2022

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18218      9785             46.29%    203946  97914        51.99%

full coverage report (for internal network access only)

leiysky
leiysky reviewed May 27, 2022
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docs/design/2022-05-19-compact-table-via-sql.md
Comment on lines +119 to +120
user initiates the `KILL`. These running "small" compaction tasks will be
untouched and kept running until finished. There is no way to stop a running
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What will happen to the intermediate files if a compact task is stopped?

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@breezewish breezewish May 27, 2022

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TiFlash only accepts segment level compaction requests and these requests cannot be stopped once started. This means, the compaction for one segment will be finished. TiDB will not send more segment level compaction requests, causing the resource usage to drop after KILLing the TiDB SQL execution.

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JaySon-Huang approved these changes May 30, 2022
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LGTM

@ti-chi-bot ti-chi-bot added status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels May 30, 2022
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breezewish commented May 30, 2022

/merge

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ti-chi-bot commented May 30, 2022

@breezewish: It seems you want to merge this PR, I will help you trigger all the tests:

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ti-chi-bot commented May 30, 2022

This pull request has been accepted and is ready to merge.

DetailsCommit hash: d7e7694

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label May 30, 2022
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ti-chi-bot commented May 30, 2022

@breezewish: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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sre-bot commented May 30, 2022

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18218      9785             46.29%    203946  97913        51.99%

full coverage report (for internal network access only)

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sre-bot commented May 30, 2022

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18291      9796             46.44%    204931  98224        52.07%

full coverage report (for internal network access only)

@ti-chi-bot ti-chi-bot merged commit 335b124 into master May 30, 2022
@breezewish breezewish deleted the wenxuan/rfc/compact branch May 30, 2022 08:55
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@JaySon-Huang JaySon-Huang JaySon-Huang approved these changes

@lidezhu lidezhu lidezhu approved these changes

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@leiysky leiysky leiysky left review comments

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