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https://issues.apache.org/jira/browse/HBASE-15222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15583916#comment-15583916
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stack commented on HBASE-15222:
-------------------------------

Sounds good to me. We should pick up the recent [~ghelmling] patch that undoes 
counter thread localling too if we do backport.

> Use less contended classes for metrics
> --------------------------------------
>
>                 Key: HBASE-15222
>                 URL: https://issues.apache.org/jira/browse/HBASE-15222
>             Project: HBase
>          Issue Type: Improvement
>          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
>
>         Attachments: HBASE-15222-ADD-0.patch, HBASE-15222-v1.patch, 
> HBASE-15222-v10.patch, HBASE-15222-v11.patch, HBASE-15222-v12.patch, 
> HBASE-15222-v13.patch, HBASE-15222-v2.patch, HBASE-15222-v3.patch, 
> HBASE-15222-v5.patch, HBASE-15222-v6.patch, HBASE-15222-v8.patch, 
> HBASE-15222-v9.patch, HBASE-15222.patch
>
>
> 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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