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https://issues.apache.org/jira/browse/YARN-2352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14090790#comment-14090790
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Karthik Kambatla commented on YARN-2352:
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Both tests pass locally for me, and the failures seen here are unrelated to the 
patch. 

Committing this. 

> FairScheduler: Collect metrics on duration of critical methods that affect 
> performance
> --------------------------------------------------------------------------------------
>
>                 Key: YARN-2352
>                 URL: https://issues.apache.org/jira/browse/YARN-2352
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.4.1
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: fs-perf-metrics.png, yarn-2352-1.patch, 
> yarn-2352-2.patch, yarn-2352-2.patch, yarn-2352-3.patch, yarn-2352-4.patch, 
> yarn-2352-5.patch, yarn-2352-6.patch
>
>
> We need more metrics for better visibility into FairScheduler performance. At 
> the least, we need to do this for (1) handle node events, (2) update, (3) 
> compute fairshares, (4) preemption.



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