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https://issues.apache.org/jira/browse/HBASE-14386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14902301#comment-14902301
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binlijin commented on HBASE-14386:
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Most of the time we only need to get the read lock, only when snapshot only we
need to get write lock, so i think the lock may not heavy.
> Reset MutableHistogram's min/max/sum after snapshot
> ---------------------------------------------------
>
> Key: HBASE-14386
> URL: https://issues.apache.org/jira/browse/HBASE-14386
> Project: HBase
> Issue Type: Bug
> Reporter: binlijin
> Assignee: Oliver
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-14386.patch
>
>
> Current MutableHistogram do not reset min/max/sum after snapshot, so we
> affect by historical data. For example when i monitor the QueueCallTime_mean,
> i see one host's QueueCallTime_mean metric is high, but when i trace the
> host's regionserver log i see the QueueCallTime_mean has been lower, but the
> metric is still high.
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