[jira] [Created] (HBASE-24367) ScheduledChore log elapsed timespan in a human-friendly format

["Nick Dimiduk (Jira)" <ji...@apache.org>]

Nick Dimiduk created HBASE-24367:
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             Summary: ScheduledChore log elapsed timespan in a human-friendly format
                 Key: HBASE-24367
                 URL: https://issues.apache.org/jira/browse/HBASE-24367
             Project: HBase
          Issue Type: Task
          Components: master, regionserver
    Affects Versions: 2.3.0
            Reporter: Nick Dimiduk


I noticed this in a log line,

{noformat}
2020-04-23 18:31:14,183 INFO org.apache.hadoop.hbase.ScheduledChore: host-a.example.com,16000,1587577999888-ClusterStatusChore average execution time: 68488258 ns.
{noformat}

I'm not sure if there's a case when elapsed time in nanoseconds is meaningful for these background chores, but we could do a little work before printing the number and time unit to truncate precision down to something a little more intuitive for operators. This number purports to be an average, so a high level of precision isn't necessarily meaningful.

Separately, or while we're here, if we think an operator really cares about the performance of this chore, we should print a histogram of elapsed times, rather than an opaque average.



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