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https://issues.apache.org/jira/browse/YARN-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788226#comment-13788226
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Jason Lowe commented on YARN-451:
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I've found #containers to not be a very useful metric, as it doesn't
necessarily map closely to the amount of cluster resources. Sometimes apps run
with lots of tiny containers while others run with huge containers. I think
showing the resource utilization in terms of memory and CPU for both current
and ask would be useful. That would show which apps are big right now and
which are trying to be much bigger.
> 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
> Assignee: Sangjin Lee
> Priority: Blocker
> Attachments: in_progress_2x.png, yarn-451-trunk-20130916.1.patch
>
>
> 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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