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From "zhangshilong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5969) FairShareComparator getResourceUsage poor performance
Date Wed, 21 Dec 2016 08:23:58 GMT

     [ https://issues.apache.org/jira/browse/YARN-5969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

zhangshilong updated YARN-5969:
-------------------------------
    Attachment: pending_before.png
                pending_after.png
                containerAllocatedDelta_before.png
                apprunning_before.png

> FairShareComparator getResourceUsage poor performance
> -----------------------------------------------------
>
>                 Key: YARN-5969
>                 URL: https://issues.apache.org/jira/browse/YARN-5969
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>    Affects Versions: 2.7.1
>            Reporter: zhangshilong
>            Assignee: zhangshilong
>         Attachments: 20161206.patch, apprunning_before.png, containerAllocatedDelta_before.png,
pending_after.png, pending_before.png
>
>
> in FairShareComparator class, the performance of function getResourceUsage()  is very
poor. It will be executed above 100,000,000 times per second.
> In our scene, It  takes 20 seconds per minute.  
> A simple solution is to reduce call counts  of the function.



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