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https://issues.apache.org/jira/browse/HBASE-15222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15147948#comment-15147948
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Mikhail Antonov commented on HBASE-15222:
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Bumping priority to critical as I've seen on some of our clusters that when nun
of active handlers goes above certain threshold (35 or 40 threads) user-cpu
jumpt to 90+% and more than half (and sometimes 80%) of threads are running
histogram updates :(
> Use HDR histograms rather than hadoop or yammer's
> -------------------------------------------------
>
> Key: HBASE-15222
> URL: https://issues.apache.org/jira/browse/HBASE-15222
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.0.0, 1.2.0, 1.3.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Critical
> Fix For: 2.0.0, 1.3.0
>
>
> Running the benchmarks now, but it looks like the results are pretty extreme.
> The locking in our histograms is pretty extreme.
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