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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16146) Counters are expensive...
Date Wed, 12 Oct 2016 01:32:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15567218#comment-15567218
] 

Hudson commented on HBASE-16146:
--------------------------------

FAILURE: Integrated in Jenkins build HBase-1.3-JDK8 #42 (See [https://builds.apache.org/job/HBase-1.3-JDK8/42/])
HBASE-16146 Remove thread local usage in Counter (garyh: rev dcb47c9b715c2331abe7e8ccbc1b69f24168dd97)
* (edit) hbase-common/src/main/java/org/apache/hadoop/hbase/util/Counter.java


> Counters are expensive...
> -------------------------
>
>                 Key: HBASE-16146
>                 URL: https://issues.apache.org/jira/browse/HBASE-16146
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: stack
>            Assignee: Gary Helmling
>             Fix For: 2.0.0, 1.3.0, 1.4.0
>
>         Attachments: HBASE-16146.001.patch, HBASE-16146.branch-1.001.patch, HBASE-16146.branch-1.3.001.patch,
counters.patch, less_and_less_counters.png
>
>
> Doing workloadc, perf shows 10%+ of CPU being spent on counter#add. If I disable some
of the hot ones -- see patch -- I can get 10% more throughput (390k to 440k). Figure something
better.



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