zoucao created FLINK-23510:
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Summary: add a new metric to show the max usage of
inputExclusiveBuffer for each inputChannel
Key: FLINK-23510
URL: https://issues.apache.org/jira/browse/FLINK-23510
Project: Flink
Issue Type: Improvement
Components: Runtime / Metrics
Reporter: zoucao
Now, the 'inPoolUsage' and 'inputExclusiveBuffersUsage' describe the overall
situation of a task's network usage. Sometimes, when the back pressure was
present, I found the value of 'inPoolUsage' or 'inputExclusiveBuffersUsage'
were very low, beacuse they were averaged by the input channel whose buffer
usage is low. I propose to add a new metric for each task to record the maximum
buffer usage of all input channels belonged to this task.
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