Fix stale read can not eliminate the learner read on TiFlash (#10099)#10132
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ti-chi-bot[bot] merged 1 commit intopingcap:release-8.1from Apr 24, 2025
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Signed-off-by: CalvinNeo <calvinneo1995@gmail.com>
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…#10099) (pingcap#10132) ref pingcap#4982, close pingcap#10046 Signed-off-by: CalvinNeo <calvinneo1995@gmail.com>
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…#10134) Note: * This change to the FFI interface for proxy adaptation. And the related issue is currently suspected to potentially cause fluctuations in LearnerRead latency in some cases. #9841, #9882 * This change to the FFI interface for proxy adaptation #9893 * Fix stale read can not eliminate the learner read #10132 ### What problem does this PR solve? Issue Number: ref #4982, close #10046 Problem Summary: update proxy to raftstore-proxy-8.1 Proxy PR: Including:\nSubmodule contrib/tiflash-proxy caa7a0c1dd..96545a2632: > Fix safe ts not updated (#429) (#434) The leader_safe_ts, self_safe_ts are always 0 in the TiFlash side, making TiFlash can not eliminate the learner read on region without any updates. ### What is changed and how it works? For detailed reasons why safe_ts failed to be updated, checkout the description on pingcap/tidb-engine-ext#429. ### Check List Tests <!-- At least one of them must be included. --> - [ ] Unit test - [ ] Integration test - [x] 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 <!-- bugfix or new feature needs a release note --> ```release-note Fix the issue that `SELECT ... AS OF TIMESTAMP` can not eliminate the learner read on TiFlash as expected ``` --------- Signed-off-by: Calvin Neo <calvinneo1995@gmail.com> Signed-off-by: JaySon-Huang <tshent@qq.com> Signed-off-by: CalvinNeo <calvinneo1995@gmail.com> Co-authored-by: Calvin Neo <CalvinNeo@users.noreply.github.com> Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io> Co-authored-by: Calvin Neo <calvinneo1995@gmail.com>
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What problem does this PR solve?
Issue Number: ref #4982, close #10046
Problem Summary:
update proxy to raftstore-proxy-8.1
Proxy PR:
Including:\nSubmodule contrib/tiflash-proxy caa7a0c1dd..96545a2632:
The leader_safe_ts, self_safe_ts are always 0 in the TiFlash side, making TiFlash can not eliminate the learner read on region without any updates.
What is changed and how it works?
For detailed reasons why safe_ts failed to be updated, checkout the description on pingcap/tidb-engine-ext#429.
Check List
Tests
Side effects
Documentation
Release note