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https://issues.apache.org/jira/browse/YARN-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737641#comment-13737641
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Vinod Kumar Vavilapalli commented on YARN-451:
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In YARN, resource usage by applications is dynamic. So at any point of time, RM
CANNOT tell you what the max is for any given application.
What we can do is show how many containers has any application has allocated
till this point of time overall(which would be getNumUsedContainers()). Again
this is dynamic and with MR it slowly increases over time. May or may not be
much of a use.
We can and will definitely add more information on the per-app page. But is
showing on the app-list page a big requirement or showing it on the per-app
page enough?
> Add more metrics to RM page
> ---------------------------
>
> Key: YARN-451
> URL: https://issues.apache.org/jira/browse/YARN-451
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Affects Versions: 2.0.3-alpha
> Reporter: Lohit Vijayarenu
> Priority: Minor
>
> ResourceManager webUI shows list of RUNNING applications, but it does not
> tell which applications are requesting more resource compared to others. With
> cluster running hundreds of applications at once it would be useful to have
> some kind of metric to show high-resource usage applications vs low-resource
> usage ones. At the minimum showing number of containers is good option.
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