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https://issues.apache.org/jira/browse/AMBARI-5400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Srimanth Gunturi resolved AMBARI-5400.
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Resolution: Fixed
+1 received. Committed to trunk and branch-1.5.1
> Inefficient default Map heap size values set by Ambari
> ------------------------------------------------------
>
> Key: AMBARI-5400
> URL: https://issues.apache.org/jira/browse/AMBARI-5400
> Project: Ambari
> Issue Type: Task
> Components: client
> Affects Versions: 1.5.1
> Reporter: Srimanth Gunturi
> Assignee: Srimanth Gunturi
> Fix For: 1.5.1
>
> Attachments: AMBARI-5400.patch
>
>
> Currently Ambari calculates the number of containers per node, and the size
> of each container. This size is used to set the java heap size for Maps and
> Reduces.
> Ambari sets the Map heap size using the following formula - which is
> inefficient usage of resources.
> {code}
> map_memory = math.floor(container_ram / 2)
> {code}
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