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store/tikv: ignore all locks except the first met lock in autocommit get #24084

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merged 2 commits into from
Apr 21, 2021

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sticnarf
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What is changed and how it works?

This PR reverts #22789. In addition, this PR makes point select with max ts ignore all locks except the first one.

The solution is to minimize changes done to the release-5.0 branch.
For the master branch, I think we can use a new protocol that brings the first lock's start_ts to reduce invalid retries.

Check List

Tests

  • Unit test
  • Manual test (add detailed scripts or steps below)

Benchmark result:
图片

Release note

  • Fix performance regression of point select.

@sticnarf sticnarf added the sig/transaction SIG:Transaction label Apr 16, 2021
@ti-chi-bot ti-chi-bot added the size/L Denotes a PR that changes 100-499 lines, ignoring generated files. label Apr 16, 2021
@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Apr 16, 2021
Signed-off-by: Yilin Chen <sticnarf@gmail.com>
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • MyonKeminta
  • youjiali1995

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After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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@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 Apr 21, 2021
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/merge

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

Commit hash: 2b3a94b

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Apr 21, 2021
@ti-chi-bot ti-chi-bot merged commit 59b8da7 into pingcap:master Apr 21, 2021
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4 participants