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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