zlzhang0122 created FLINK-19876:
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Summary: Latency metrics can merge chain task latency metrics to
reduce the number of latency metrics
Key: FLINK-19876
URL: https://issues.apache.org/jira/browse/FLINK-19876
Project: Flink
Issue Type: Improvement
Components: Runtime / Metrics
Reporter: zlzhang0122
In latency metrics report, each operator will report themselves latency metics,
but actually the communication between chain operators which in one task is
very fast and the latency can be ignored.So maybe we can merge the chain
operator latency metrics into one to decrease the number of it.
For example, if source operator and downstream flat Map operator has been
chained, now it will report the latency metrics separately, while we can merge
it and make them report their latency metrics only once.
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