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https://issues.apache.org/jira/browse/FLINK-15637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17019299#comment-17019299
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Stephan Ewen commented on FLINK-15637:
--------------------------------------

That seems like a relatively small regression to me, I had expected a more 
severe regression by default.

Good to see!

> For RocksDBStateBackend, make RocksDB the default store for timers
> ------------------------------------------------------------------
>
>                 Key: FLINK-15637
>                 URL: https://issues.apache.org/jira/browse/FLINK-15637
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / State Backends
>            Reporter: Stephan Ewen
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 1.10.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Set the {{state.backend.rocksdb.timer-service.factory}} to {{ROCKSDB}} by 
> default. Also ensure that the programmatic default value becomes the same.
> We need to update the performance tuning guide to mention this.
>  
> We need to update the release notes to mention this.
>  



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