Karthik Kambatla commented on YARN-2393:

One of the reasons we (Sandy and I) wanted to make the fairshare being used for 
scheduling instantaneous was to address the case where the maxAMResource 
becomes so small when there are multiple queues that we can't run any 
applications at all. I think it is better to leave it as is. In case any one 
runs into (in testing) issues with maxAMResource, we can consider preempting 
AMs as an alternative. 

> FairScheduler: Implement steady fair share
> ------------------------------------------
>                 Key: YARN-2393
>                 URL: https://issues.apache.org/jira/browse/YARN-2393
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>            Reporter: Ashwin Shankar
>            Assignee: Wei Yan
>         Attachments: YARN-2393-1.patch, YARN-2393-2.patch, YARN-2393-3.patch, 
> yarn-2393-4.patch
> Static fair share is a fair share allocation considering all(active/inactive) 
> queues.It would be shown on the UI for better predictability of finish time 
> of applications.
> We would compute static fair share only when needed, like on queue creation, 
> node added/removed. Please see YARN-2026 for discussions on this. 

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