Greg Hogan created FLINK-4452:
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Summary: TaskManager network buffer guages
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 guages 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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