sink(ticdc): limit the number of transactions cached in a mysql worker (#10892) #10940
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This is an automated cherry-pick of #10892
What problem does this PR solve?
Issue Number: close #10896
What is changed and how it works?
Txn.Workerto reduce interdependencies between modules.Txn.Worker.causality.workerthat support different batch control policies.Check List
Tests
In the workload skew case, the maximum performance improvement after optimization is about 300% ~ 1000%.
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note