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From "Gera Shegalov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6209) Implement a heuristic to auto-size Java heap of MRAppMaster container proportional to the job size
Date Fri, 16 Jan 2015 20:34:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14280793#comment-14280793
] 

Gera Shegalov commented on MAPREDUCE-6209:
------------------------------------------

Karthik's comment captures my intention. Added "proportional to the job size" to the title
for clarification.

> Implement a heuristic to auto-size Java heap of MRAppMaster container proportional to
the job size
> --------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6209
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6209
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: applicationmaster
>            Reporter: Gera Shegalov
>
> The size of Java heap required by the AM is linearly proportional to the size of the
MR job (number of mappers/splits and reducers). it would be nice if users did not have to
adjust the AM container size when transitioning from testing job on a small sample to a production
job on a full-scale dataset. 



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