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https://issues.apache.org/jira/browse/HADOOP-5881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715495#action_12715495
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Hemanth Yamijala commented on HADOOP-5881:
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bq. It would be useful if the description of the above memory management
parameters is added in mapred-default.xml. Also
mapred.tasktracker.vmem.reserved, mapred.task.default.maxvmem and
mapred.task.limit.maxvmem has to be removed from the xml.
+1 regarding documentation. I filed HADOOP-5957 to track this. But we are
planning to introduce backwards compatible options, so removing the
configuration parameters from xml will not be necessary. Please see HADOOP-5919.
> Simplify configuration related to task-memory-monitoring and memory-based
> scheduling
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-5881
> URL: https://issues.apache.org/jira/browse/HADOOP-5881
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Vinod K V
> Assignee: Vinod K V
> Fix For: 0.20.1
>
> Attachments: HADOOP-5881-20090526-branch-20.1.txt,
> HADOOP-5881-20090526.1.txt
>
>
> The configuration we have now is pretty complicated. Besides everything else,
> the mechanism of not specifying parameters separately for maps and reduces
> leads to problems like HADOOP-5811. This JIRA should address simplifying
> things and at the same time solving these problems.
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