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https://issues.apache.org/jira/browse/MAPREDUCE-1018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hemanth Yamijala updated MAPREDUCE-1018:
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    Attachment: MAPRED-1018-8.patch.txt

Attaching a patch that makes changes in documentation for physical memory 
monitoring and configuration as well. Over the last patch, the main changes are:

- Describe the user and admin options for physical memory usage in the 
mapred-tutorial and cluster-setup guides respectively. I also included a small 
note on when physical memory monitoring was found useful based on discussions 
in MAPREDUCE-1221.
- Qualified memory as virtual or physical or both at relevant places so we are 
clear what we are talking about.

> Document changes to the memory management and scheduling model
> --------------------------------------------------------------
>
>                 Key: MAPREDUCE-1018
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1018
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: documentation
>    Affects Versions: 0.21.0
>            Reporter: Hemanth Yamijala
>            Assignee: Hemanth Yamijala
>            Priority: Blocker
>             Fix For: 0.21.0
>
>         Attachments: MAPRED-1018-1.patch, MAPRED-1018-2.patch, 
> MAPRED-1018-3.patch, MAPRED-1018-4.patch.txt, MAPRED-1018-5.patch.txt, 
> MAPRED-1018-6.patch.txt, MAPRED-1018-7.patch.txt, MAPRED-1018-8.patch.txt, 
> MAPRED-1018-commons.patch
>
>
> There were changes done for the configuration, monitoring and scheduling of 
> high ram jobs. This must be documented in the mapred-defaults.xml and also on 
> forrest documentation

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