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After the cdc master and backup are synchronized with the normal table, the cpu keeps rising and does not fall. #3836

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After the cdc master and backup are synchronized with the normal table, the cpu keeps rising and does not fall.#3836
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contributionThis PR is from a community contributor.first-time-contributorIndicates that the PR was contributed by an external member and is a first-time contributor.type/bugThe issue is confirmed as a bug.
@HGHNice

Description

@HGHNice
HGHNice
opened on Dec 29, 2025

What did you do?

Configure CDC tasks, including sending information to downstream pulsar and tidb

What did you expect to see?

I expect to see normal CPU drops

What did you see instead?

  • v8.5.3
Image - v8.5.2 Image Image - v8.5.2

profiling_2025-12-29_15-59-00.zip

  • v8.5.3

profiling_2025-12-29_16-04-45.zip

Versions of the cluster

Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

v8.5.2,v8.5.3

Upstream TiKV version (execute tikv-server --version):

v8.5.2,v8.5.3

TiCDC version (execute cdc version):

v8.5.2,v8.5.3

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    contributionThis PR is from a community contributor.first-time-contributorIndicates that the PR was contributed by an external member and is a first-time contributor.type/bugThe issue is confirmed as a bug.

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