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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2225) Turn the virtual memory check to be off by default
Date Tue, 16 Feb 2016 10:52:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-2225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148449#comment-15148449
] 

Akira AJISAKA commented on YARN-2225:
-------------------------------------

bq. Why not making vmem-pmem ratio larger to address the problem?
Yes, we can avoid the error by making vmem-pmem ratio larger, so the problems are, the default
value of the ratio is too small for Java 8 and the virtual memory check is enabled by default.
Can we make the ratio larger, or make the vmem check disabled by default?

> Turn the virtual memory check to be off by default
> --------------------------------------------------
>
>                 Key: YARN-2225
>                 URL: https://issues.apache.org/jira/browse/YARN-2225
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-2225.patch
>
>
> The virtual memory check may not be the best way to isolate applications. Virtual memory
is not the constrained resource. It would be better if we limit the swapping of the task using
swapiness instead. This patch will turn this DEFAULT_NM_VMEM_CHECK_ENABLED off by default
and let users turn it on if they need to.



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