Akira AJISAKA commented on YARN-3432:

bq. Rethinking this, it's better to change how to calculate availableMB in 
CapacityScheduler. availableMB should include reservedMB for consistency.
or to change how to calculate availableMB in FairScheduler to exclude 
reservedMB. As [~skaterxu] commented,  we need to take care of vcores as well.

> Cluster metrics have wrong Total Memory when there is reserved memory on CS
> ---------------------------------------------------------------------------
>                 Key: YARN-3432
>                 URL: https://issues.apache.org/jira/browse/YARN-3432
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler, resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Thomas Graves
>            Assignee: Brahma Reddy Battula
>         Attachments: YARN-3432-002.patch, YARN-3432.patch
> I noticed that when reservations happen when using the Capacity Scheduler, 
> the UI and web services report the wrong total memory.
> For example.  I have a 300GB of total memory in my cluster.  I allocate 50 
> and I reserve 10.  The cluster metrics for total memory get reported as 290GB.
> This was broken by https://issues.apache.org/jira/browse/YARN-656 so perhaps 
> there is a difference between fair scheduler and capacity scheduler.

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