Hua Liu created HDFS-9882:
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Summary: Change the meaning of heartbeat latency
Key: HDFS-9882
URL: https://issues.apache.org/jira/browse/HDFS-9882
Project: Hadoop HDFS
Issue Type: Task
Components: datanode
Reporter: Hua Liu
Assignee: Hua Liu
Priority: Minor
Heartbeat latency only reflects the time spent on generating reports and
sending reports to NN. When heartbeats are delayed due to processing commands,
this latency does not help investigation. I would like to propose either (1)
changing the heartbeat latency to reflect the total time spent on sending
reports and processing commands or (2) adding another metric counter to show
the total time.
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