[jira] [Created] (AMBARI-5400) Inefficient default Map heap size values set by Ambari

["Srimanth Gunturi (JIRA)" <ji...@apache.org>]

Srimanth Gunturi created AMBARI-5400:
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             Summary: 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


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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