statistics: enlarge capacity of ddlEventCh to 1000 (#39532) #39563
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This is an automated cherry-pick of #39532
What problem does this PR solve?
Issue Number: ref #38189 ref #36004
Problem Summary:
What is changed and how it works?
Enlarge the capacity of
ddlEventCh
to 1000, which can reduce the change of[ddl] fail to notify DDL event
.Check List
Tests
Side effects
Documentation
Release note
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