[jira] [Commented] (YARN-6418) Reduce Resource object creation and overhead in Capacity scheduler inner loop

["Arun Suresh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15950091#comment-15950091 ] 

Arun Suresh commented on YARN-6418:
-----------------------------------

[~leftnoteasy], given the work done on YARN-6040. I understand you had performed some profiling on the scheduler and identified a couple of places you found the PBImpl object instantiation was getting a bit expensive, so would be interested in your thoughts here as well.

> Reduce Resource object creation and overhead in Capacity scheduler inner loop
> -----------------------------------------------------------------------------
>
>                 Key: YARN-6418
>                 URL: https://issues.apache.org/jira/browse/YARN-6418
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler, resourcemanager
>    Affects Versions: 2.7.3, 3.0.0-alpha2, 2.8
>            Reporter: Roni Burd
>            Assignee: Roni Burd
>
> Resource object is used multiple due to ResourceCalculator creates new instances on every method call. This gets called several times on each node HB. Resource is a very expensive object that relies on Protobufs 
> The change is to remove the need to use protobuf on the Resource object and avoid creating many objects in the Resource Calculator all the time



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