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mysql (ticdc): Improve the performance of the mysql sink by refining the transaction event batching logic (#10466) #11242

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merged 2 commits into from
Jun 5, 2024
Merged

mysql (ticdc): Improve the performance of the mysql sink by refining the transaction event batching logic (#10466) #11242

merged 2 commits into from
Jun 5, 2024

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This is an automated cherry-pick of #10466

What problem does this PR solve?

Issue Number: close #11241

What is changed and how it works?

  1. When there are a lot of txns in worker's txnCh, we try to do flush until save batches to maxTxnRows, instead of doing flush with tiny txns because of ticker.C.
  2. Adjust the calculation of worker-busy-ratio to make it more precise and more clear.
    The original calculation of worker-busy-ratio may have certain deviation when the flush time is long (such as larger than hundreds of milliseconds). And the longer the flush time, the larger the deviation. The reason for the deviation is that when the flsuh time is long, the interval between each time we increase the worker busy ratio value clearly exceeds 1s, resulting in the growth rate of the worker-busy-ratio per second being less than actual rate.

Performance Test Result

We take a large workload on upstream to keep worker-busy-ratio as 100%, and compare the improvement of sink performance before and after optimization.

  1. Simulate network latency between the upstream and downstream is 2ms.
    After Optimization -- 33339 rows/s (+14%). Before Optimization -- 29075 rows/s
  2. Simulate network latency between the upstream and downstream is 5ms.
    After Optimization -- 20528 rows/s(+13%). Before Optimization -- 18129 rows/s
  3. Simulate network latency between the upstream and downstream is 20ms.
    After Optimization -- 7273 rows/s(+20%). Before Optimization -- 6048 rows/s
    image

New panel of worker busy ratio

img_v3_0274_02f665a8-9887-4a35-a4f7-9dceaa8d497g

Check List

Tests

  • Manual test (add detailed scripts or steps below)

Questions

Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?

Release note 

None

@hongyunyan @ti-chi-bot
This is an automated cherry-pick of pingcap#10466
bda46d7 
Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
@ti-chi-bot ti-chi-bot added 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. type/cherry-pick-for-release-6.5 This PR is cherry-picked to release-6.5 from a source PR. labels Jun 4, 2024
@ti-chi-bot ti-chi-bot mentioned this pull request Jun 4, 2024
Merged
@ti-chi-bot ti-chi-bot bot added the do-not-merge/cherry-pick-not-approved The current cherry-pick pull request has not been approved and cannot be merged. label Jun 4, 2024
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Jun 4, 2024
@ti-chi-bot ti-chi-bot bot removed the do-not-merge/cherry-pick-not-approved The current cherry-pick pull request has not been approved and cannot be merged. label Jun 4, 2024
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/retest

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/retest

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/retest

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ti-chi-bot bot commented Jun 5, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hicqu

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@ti-chi-bot ti-chi-bot bot added the approved label Jun 5, 2024
@ti-chi-bot ti-chi-bot bot merged commit a912d33 into pingcap:release-6.5 Jun 5, 2024
8 of 10 checks passed
hicqu added a commit to ti-chi-bot/tiflow that referenced this pull request Jun 12, 2024
@hicqu
Squashed commit of the following:
a3d30ca 
commit c092599
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 12 00:26:59 2024 +0800

    pkg/config, sink(ticdc): support output raw change event for mq and cloud storage sink (pingcap#11226) (pingcap#11290)

    close pingcap#11211

commit 3426e46
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 19:40:29 2024 +0800

    puller(ticdc): fix wrong update splitting behavior after table scheduling (pingcap#11269) (pingcap#11282)

    close pingcap#11219

commit 2a28078
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 16:40:37 2024 +0800

    mysql(ticdc): remove error filter when check isTiDB in backend init (pingcap#11214) (pingcap#11261)

    close pingcap#11213

commit 2425d54
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 16:40:30 2024 +0800

    log(ticdc): Add more error query information to the returned error to facilitate users to know the cause of the failure (pingcap#10945) (pingcap#11257)

    close pingcap#11254

commit 053cdaf
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 15:34:30 2024 +0800

    cdc: log slow conflict detect every 60s (pingcap#11251) (pingcap#11287)

    close pingcap#11271

commit 327ba7b
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Tue Jun 11 11:42:00 2024 +0800

    redo(ticdc): return internal error in redo writer (pingcap#11011) (pingcap#11091)

    close pingcap#10124

commit d82ae89
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Mon Jun 10 22:28:29 2024 +0800

    ddl_puller (ticdc): handle dorp pk/uk ddl correctly (pingcap#10965) (pingcap#10981)

    close pingcap#10890

commit f15bec9
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Fri Jun 7 16:16:28 2024 +0800

    redo(ticdc): enable pprof and set memory limit for redo applier (pingcap#10904) (pingcap#10996)

    close pingcap#10900

commit ba50a0e
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 19:58:26 2024 +0800

    test(ticdc): enable sequence test (pingcap#11023) (pingcap#11037)

    close pingcap#11015

commit 94b9897
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 17:08:56 2024 +0800

    mounter(ticdc): timezone fill default value should also consider tz. (pingcap#10932) (pingcap#10946)

    close pingcap#10931

commit a912d33
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed Jun 5 10:49:25 2024 +0800

    mysql (ticdc): Improve the performance of the mysql sink by refining the transaction event batching logic (pingcap#10466) (pingcap#11242)

    close pingcap#11241

commit 6277d9a
Author: dongmen <20351731+asddongmen@users.noreply.github.com>
Date:   Wed May 29 20:13:22 2024 +0800

    kvClient (ticdc): revert e5999e3 to remove useless metrics (pingcap#11184)

    close pingcap#11073

commit 54e93ed
Author: dongmen <20351731+asddongmen@users.noreply.github.com>
Date:   Wed May 29 17:43:22 2024 +0800

    syncpoint (ticdc): make syncpoint support base64 encoded password (pingcap#11162)

    close pingcap#10516

commit 0ba9329
Author: Ti Chi Robot <ti-community-prow-bot@tidb.io>
Date:   Wed May 29 09:07:21 2024 +0800

    (redo)ticdc: fix the event orderliness in redo log (pingcap#11117) (pingcap#11180)

    close pingcap#11096

Signed-off-by: qupeng <qupeng@pingcap.com>
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