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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1775) Create SMAPBasedProcessTree to get PSS information
Date Wed, 19 Mar 2014 22:59:43 GMT

    [ https://issues.apache.org/jira/browse/YARN-1775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941120#comment-13941120
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Chris Nauroth commented on YARN-1775:
-------------------------------------

[~rajesh.balamohan], thank you for explaining the testing.  These results sound very promising!
 Also interesting would be confirming that containers still get killed for exceeding the limit
with private/non-shared pages.

I wonder then if counting RSS still has some potential advantages in certain deployments,
or if the PSS approach is always superior.  Your testing so far seems to indicate that PSS
is always superior.  Therefore, should this just be combined right into the current code?
 (This echoes Vinod's prior comment about folding the logic back into {{ProcfsBasedProcessTree}}.)
 A conservative approach is to introduce a config flag, try to get some experience running
it in real-world clusters, and then we can flip the default in a later release if it goes
well.

> Create SMAPBasedProcessTree to get PSS information
> --------------------------------------------------
>
>                 Key: YARN-1775
>                 URL: https://issues.apache.org/jira/browse/YARN-1775
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>         Attachments: yarn-1775-2.4.0.patch
>
>
> Create SMAPBasedProcessTree (by extending ProcfsBasedProcessTree), which will make use
of PSS for computing the memory usage. 



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