fix unexpected slow query during GC running after stop 1 tikv-server #899
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Signed-off-by: crazycs520 <[email protected]>
Signed-off-by: crazycs520 <[email protected]>
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This problem reminds me of the issue from the TiDB forum: https://ask.pingcap.com/t/every-10-minutes-my-in-flight-stale-reads-fail/518 |
cfzjywxk
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Jul 24, 2023
Signed-off-by: crazycs520 <[email protected]>
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Jul 24, 2023
you06
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Jul 24, 2023
MyonKeminta
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Jul 24, 2023
zyguan
reviewed
Jul 24, 2023
Signed-off-by: crazycs520 <[email protected]>
zyguan
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Jul 24, 2023
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/hold since the test failed. |
Signed-off-by: crazycs520 <[email protected]>
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Jul 26, 2023
…899) (#909) * fix unexpected slow query during GC running after stop 1 tikv-server Signed-off-by: crazycs520 <[email protected]> * fix test Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]>
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Aug 7, 2023
…ikv#899) Signed-off-by: crazycs520 <[email protected]>
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Aug 11, 2023
* client-go: add some key range info to error when PD returned no region (#862) Signed-off-by: Chao Wang <[email protected]> * *: refine non-global stale-read request retry logic (#863) Signed-off-by: crazycs520 <[email protected]> * Fix the issue that primary pessimistic lock may be left not cleared after GC (#866) * Fix the issue that primary pessimistic lock may be left not cleared after GC Signed-off-by: MyonKeminta <[email protected]> * Fix mysteriously shown up thing that makes compilation failed Signed-off-by: MyonKeminta <[email protected]> * Fix test effectiveness (forgot to set txn2 to pessimistic txn); add more strict checks Signed-off-by: MyonKeminta <[email protected]> * Address comments Signed-off-by: MyonKeminta <[email protected]> --------- Signed-off-by: MyonKeminta <[email protected]> Co-authored-by: MyonKeminta <[email protected]> * add explicit request source type to label the external request like lightning/br (#868) Signed-off-by: nolouch <[email protected]> * use '%d' instead of '%q' for some int values in error message (#875) Signed-off-by: Chao Wang <[email protected]> * format key in error message in method `scanRegions` (#876) Signed-off-by: Chao Wang <[email protected]> * make cop request timeout a config paramter (#865) * update Signed-off-by: Spade A <[email protected]> * update Signed-off-by: Spade A <[email protected]> * update Signed-off-by: Spade A <[email protected]> * update Signed-off-by: Spade A <[email protected]> --------- Signed-off-by: Spade A <[email protected]> * region_cache: support check pending tiflash peer (#821) Signed-off-by: guo-shaoge <[email protected]> Co-authored-by: disksing <[email protected]> * *: add `SnapshotIterReverse` and make `iterReverse` supports `lowerBound` (#883) Signed-off-by: Jason Mo <[email protected]> * *: fix stale read ops metric (#878) (#889) Signed-off-by: crazycs520 <[email protected]> Co-authored-by: disksing <[email protected]> * add gc options (#828) Signed-off-by: weedge <[email protected]> Co-authored-by: disksing <[email protected]> * reload region cache when store is resolved from invalid status (#843) Signed-off-by: you06 <[email protected]> Co-authored-by: disksing <[email protected]> * ci: update setup-go action (#904) Signed-off-by: disksing <[email protected]> * fix unexpected slow query during GC running after stop 1 tikv-server (#899) (#909) * fix unexpected slow query during GC running after stop 1 tikv-server Signed-off-by: crazycs520 <[email protected]> * fix test Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]> * resource_manager: ignore ru metrics for background request (#872) Signed-off-by: husharp <[email protected]> Co-authored-by: disksing <[email protected]> * add more log for diagnose (#915) * add more log for diagnose Signed-off-by: crazycs520 <[email protected]> * fix Signed-off-by: crazycs520 <[email protected]> * add more log for diagnose Signed-off-by: crazycs520 <[email protected]> * add more log Signed-off-by: crazycs520 <[email protected]> * address comment Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]> * use context logger as much as possible (#908) * use context logger as much as possible Signed-off-by: crazycs520 <[email protected]> * refine Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]> * Resume max retry time check for stale read retry with leader option(#903) (#911) * Resume max retry time check for stale read retry with leader option Signed-off-by: cfzjywxk <[email protected]> * add cancel Signed-off-by: cfzjywxk <[email protected]> --------- Signed-off-by: cfzjywxk <[email protected]> * request_source: remove default label (#890) * request_source: remove default label Signed-off-by: nolouch <[email protected]> * add a function to set request source task type (#925) * add a function to set request source task type Signed-off-by: glorv <[email protected]> * ci: update go version (#936) * ci: update go version Signed-off-by: crazycs520 <[email protected]> * fix test Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]> * use tidb_kv_read_timeout as first kv request timeout (#919) * support tidb_kv_read_timeout as first round kv request timeout Signed-off-by: crazycs520 <[email protected]> * fix ci Signed-off-by: crazycs520 <[email protected]> * fix ci Signed-off-by: crazycs520 <[email protected]> * fix ci Signed-off-by: crazycs520 <[email protected]> * fix ci Signed-off-by: crazycs520 <[email protected]> * fix ci Signed-off-by: crazycs520 <[email protected]> * update comment Signed-off-by: crazycs520 <[email protected]> * refine test Signed-off-by: crazycs520 <[email protected]> --------- Signed-off-by: crazycs520 <[email protected]> * [pick] resource_control: bypass some internal urgent request (#938) * resource_control: bypass some internal urgent request (#884) Signed-off-by: nolouch <[email protected]> * resourcecontrol: fix nil pointer (#900) Signed-off-by: nolouch <[email protected]> --------- Signed-off-by: nolouch <[email protected]> --------- Signed-off-by: Chao Wang <[email protected]> Signed-off-by: crazycs520 <[email protected]> Signed-off-by: MyonKeminta <[email protected]> Signed-off-by: nolouch <[email protected]> Signed-off-by: Spade A <[email protected]> Signed-off-by: guo-shaoge <[email protected]> Signed-off-by: Jason Mo <[email protected]> Signed-off-by: weedge <[email protected]> Signed-off-by: you06 <[email protected]> Signed-off-by: disksing <[email protected]> Signed-off-by: husharp <[email protected]> Signed-off-by: cfzjywxk <[email protected]> Signed-off-by: glorv <[email protected]> Signed-off-by: iosmanthus <[email protected]> Co-authored-by: 王超 <[email protected]> Co-authored-by: crazycs <[email protected]> Co-authored-by: MyonKeminta <[email protected]> Co-authored-by: MyonKeminta <[email protected]> Co-authored-by: ShuNing <[email protected]> Co-authored-by: Spade A <[email protected]> Co-authored-by: guo-shaoge <[email protected]> Co-authored-by: disksing <[email protected]> Co-authored-by: Hangjie Mo <[email protected]> Co-authored-by: weedge <[email protected]> Co-authored-by: you06 <[email protected]> Co-authored-by: Hu# <[email protected]> Co-authored-by: cfzjywxk <[email protected]> Co-authored-by: glorv <[email protected]>
cfzjywxk
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Aug 15, 2023
…899) (#930) Signed-off-by: crazycs520 <[email protected]>
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close #898
Why issue #898 happen?
After stop 1 tikv-server, some region replicas are marked by
replica.isEpochStaleistrue. ThenaccessFollowerwon't choose the replica anymore.But when TiDB GC leader start to running GC, it will reload all region, then all region replicas epoch will be update, which means all region replica's
isEpochStalewill change tofalse. ThenaccessFollowermay choose the replica which in down tikv-server. Then TiDB may send kv request to down tikv-server will receivecontext deadline exceedederror and re-send kv request to the region leader. This is what causes slow queries.How this fix work?
In short,
accessFollowerneed to check the replica's storeLivenessStatewhen chose target replica.Before This PR:
This PR: