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https://issues.apache.org/jira/browse/HBASE-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12922713#action_12922713
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Nicolas Spiegelberg commented on HBASE-3102:
--------------------------------------------
The MetricsTimeVaryingRate introspection is primarily in
MetricsDynamicMBeanBase.java, so that would need to be hand-rolled for a custom
class. All the class variables in MetricsTimeVaryingRate are private (at
least, in 0.20), so there is no way to usefully subclass without nasty
introspection. If a completely custom class is necessary in the future, a
refactoring jira can be created later :)
I think most of these optimizations / refactoring would be good for a separate
jira. We don't need that level of granularity for polling periods, so I think
it's best to wait until someone needs that requirement.
> Enhance HRegionServerMetrics for Long-running Stats
> ---------------------------------------------------
>
> Key: HBASE-3102
> URL: https://issues.apache.org/jira/browse/HBASE-3102
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
> Fix For: 0.90.0
>
> Attachments: HBASE-3102_90.patch
>
>
> A useful metric to observe track is compaction count + duration. Since
> compactions are long running and only happen infrequently, the avg/opcount
> stats are should be reset longer than the default polling period (5 sec). In
> addition to 'hbase.period', we should allow a different duration after which
> long-running metrics should expire. This would also fix our existing metrics
> problem where min/max stats are never reset until the process is
> restarted/upgraded.
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