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https://issues.apache.org/jira/browse/FLINK-11396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17041971#comment-17041971
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Oleksandr Nitavskyi commented on FLINK-11396:
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Sorry, we still didn't migrate anything significant on the new UI.
Let's close this ticket since UI has been significantly changed?
In case we see some problems again we can always reopen with more details :)
> MetricStore creates significant GC pressure
> -------------------------------------------
>
> Key: FLINK-11396
> URL: https://issues.apache.org/jira/browse/FLINK-11396
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics
> Reporter: Oleksandr Nitavskyi
> Priority: Major
> Attachments: GC_parallel_flink_job_manager.log, g1.txt, gc_example.txt
>
>
> On Flink version 1.6.x we observe a significant increase of the latency in
> UI.
> After performance profiling, we have concluded that during UI rendering
> back-end spends 50% of the time on GC pauses, which means that Flink 1.6.x is
> not friendly with G1 GC ergonomics configurations.
> On Flink side, MetricStore creates a huge amount of short living objects for
> our job, which provokes a lot of Young GC pauses for a non-small job, with
> around 50 operators and 120 parallelisms.
> Samples of GC logs are in attach.
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