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https://issues.apache.org/jira/browse/FLINK-17468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17095773#comment-17095773
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Lu Niu commented on FLINK-17468:
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+1. I think it will be very helpful to debug checkpoint slowness. our team
created internal patch to track the uploading part in
[https://github.com/apache/flink/blob/5b71c7f2fe36c760924848295a8090898cb10f15/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/snapshot/RocksIncrementalSnapshotStrategy.java#L319]
which is a very trivial approach. In general, the upper api should be more
flexible so that different implementation (FS, RocksDB) can decide what metrics
to expose, instead of just sync and async.
> Provide more detailed metrics why asynchronous part of checkpoint is taking
> long time
> -------------------------------------------------------------------------------------
>
> Key: FLINK-17468
> URL: https://issues.apache.org/jira/browse/FLINK-17468
> Project: Flink
> Issue Type: New Feature
> Components: Runtime / Checkpointing, Runtime / Metrics, Runtime /
> State Backends
> Affects Versions: 1.10.0
> Reporter: Piotr Nowojski
> Priority: Major
>
> As [reported by
> users|https://lists.apache.org/thread.html/r0833452796ca7d1c9d5e35c110089c95cfdadee9d81884a13613a4ce%40%3Cuser.flink.apache.org%3E]
> it's not obvious why asynchronous part of checkpoint is taking so long time.
> Maybe we could provide some more detailed metrics/UI/logs about uploading
> files, materializing meta data, or other things that are happening during the
> asynchronous checkpoint process?
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