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https://issues.apache.org/jira/browse/FLINK-4452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434814#comment-15434814
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ASF GitHub Bot commented on FLINK-4452:
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Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2408
Good idea.
+1 to merge this
> TaskManager network buffer gauges
> ---------------------------------
>
> Key: FLINK-4452
> URL: https://issues.apache.org/jira/browse/FLINK-4452
> Project: Flink
> Issue Type: New Feature
> Components: Metrics
> Affects Versions: 1.2.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Priority: Minor
>
> Add gauges for
> {{network.getNetworkBufferPool.getTotalNumberOfMemorySegments}} and
> {{network.getNetworkBufferPool.getNumberOfAvailableMemorySegments}}.
> Providing insight into the number and proportion of used network buffers is
> vital and enlightening. Jobs terminate when buffers are not available, but
> also the rule-of-thumb for "Configuring the Network Buffers" from the
> documentation is way off. For example, running a sort on a single TaskManager
> with 8 slots I am using 16,000+ buffers which is much greater than 8*8*4 =
> 256.
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