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https://issues.apache.org/jira/browse/FLINK-2944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-2944:
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Issue Type: Sub-task (was: New Feature)
Parent: FLINK-3766
> Collect, expose and display operator-specific stats
> ---------------------------------------------------
>
> Key: FLINK-2944
> URL: https://issues.apache.org/jira/browse/FLINK-2944
> Project: Flink
> Issue Type: Sub-task
> Components: Local Runtime, Webfrontend
> Reporter: Fabian Hueske
> Labels: requires-design-doc
>
> It would be nice to collect operator-specific stats such as:
> - HashJoin: bytes spilled build side, bytes spilled probe side, num keys
> (build / probe)
> - GroupBy: bytes spilled, num keys, max group size, avg. group size
> - Combiner: combine rate (in/out ratio)
> - Streaming Ops: avg. throughput
> - etc.
> and display these stats in the webUI.
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