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

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

     [ https://issues.apache.org/jira/browse/AMBARI-5400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Srimanth Gunturi updated AMBARI-5400:
-------------------------------------

    Attachment: AMBARI-5400.patch

Review at https://reviews.apache.org/r/20142/

> 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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