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https://issues.apache.org/jira/browse/YARN-977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336808#comment-14336808
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Ravi Prakash commented on YARN-977:
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Is this related to YARN-1856?
> Interface for users/AM to know actual usage by the container
> ------------------------------------------------------------
>
> Key: YARN-977
> URL: https://issues.apache.org/jira/browse/YARN-977
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Omkar Vinit Joshi
>
> Today we allocate resource (memory and cpu) and node manager starts the
> container with requested resource [I am assuming they are using cgroups]. But
> there is definitely a possibility of users requesting more than what they
> actually may need during the execution of their container/job-task. If we add
> a way for users/AM to know the actual usage of the requested/completed
> container then they may optimize it for next run..
> This will be helpful for AM to optimize cpu/memory resource requests by
> querying NM/RM to know avg/max cpu/memory usage of the container or may be
> containers belonging to application.
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