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https://issues.apache.org/jira/browse/FLINK-26757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yun Tang resolved FLINK-26757.
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Resolution: Fixed
merged in master: 4034d3cd6d13e88e2e5ca101510bf333e94a53fa
> change the default value of
> state.backend.rocksdb.restore-overlap-fraction-threshold
> ------------------------------------------------------------------------------------
>
> Key: FLINK-26757
> URL: https://issues.apache.org/jira/browse/FLINK-26757
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Affects Versions: 1.16.0
> Reporter: Yanfei Lei
> Assignee: Yanfei Lei
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
> Attachments: 截屏2022-03-21 上午11.50.28.png
>
>
> `state.backend.rocksdb.restore-overlap-fraction-threshold` is used to control
> how to restore a state handle, different thresholds can affect the
> performance of restoring. The behavior of deletion in restoring has been
> changed after FLINK-21321.
> In theory, setting the default value to 0 is most suitable, since
> `deleteRange()` takes less time than creating a new RocksDB instance and then
> scan-and-put the records. In fact, we also have some experimental data that
> the default value of 0 is more suitable. Here is a comparison of
> initialization times for different thresholds, we can see that the default
> value to 0 takes less time.
> !截屏2022-03-21 上午11.50.28.png!
>
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