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https://issues.apache.org/jira/browse/MAPREDUCE-1181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Scott Chen resolved MAPREDUCE-1181.
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Resolution: Invalid
> Enforce RSS memory limit in TaskMemoryManagerThread
> ---------------------------------------------------
>
> Key: MAPREDUCE-1181
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1181
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: tasktracker
> Affects Versions: 0.20.1
> Reporter: Scott Chen
> Fix For: 0.20.1
>
> Attachments: MAPREDUCE-1181.patch
>
>
> TaskMemoryManagerThread will periodically check the rss memory usage of every
> task. If the memory usage exceeds the specified threshold, the task will be
> killed. Also if the total rss memory of all tasks exceeds (total amount of
> memory - specified reserved memory). The task with least progress will be
> killed to recover the reserved rss memory.
> This is similar to the virtual memory limit provided by
> TaskMemoryManagerThread. But now the limit is for rss memory. This new
> feature allow us to avoid page swapping which is prone to error.
> The following are the related configurations
> mapreduce.reduce.memory.rss.mb // RSS memory allowed for a reduce task
> mapreduce.map.memory.rss.mb // RSS memory allowed for a map task
> mapreduce.tasktracker.reserved.memory.rss.mb // RSS memory reserved (not
> for tasks) on a tasktracker
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