[jira] [Commented] (AMBARI-17818) Tez & Hive: Memory management should use scaled down Xmx for sizing buffers

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-17818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15387184#comment-15387184 ] 

Hadoop QA commented on AMBARI-17818:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12819160/AMBARI-17818.1.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/7948//console

This message is automatically generated.

> Tez & Hive: Memory management should use scaled down Xmx for sizing buffers
> ---------------------------------------------------------------------------
>
>                 Key: AMBARI-17818
>                 URL: https://issues.apache.org/jira/browse/AMBARI-17818
>             Project: Ambari
>          Issue Type: Bug
>          Components: stacks
>            Reporter: Gopal V
>            Assignee: Gopal V
>         Attachments: AMBARI-17818.1.patch
>
>
> The defaults in Ambari assume 80% of the YARN container size is allocate to the user heap (Xmx).
> On top of this particular restriction, the allocation blocks are divided into Eden/Survivor/Tenured - a single allocation spanning 40% of the heap might fail for tez runtime.io.sort.mb.
> Scale down the Tez sort size and map join by 0.8x to match Xmx.



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