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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-3115) Shuffle string handling adds significant memory overhead
Date Mon, 29 Feb 2016 09:52:18 GMT

    [ https://issues.apache.org/jira/browse/TEZ-3115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15171663#comment-15171663
] 

Rajesh Balamohan commented on TEZ-3115:
---------------------------------------

Minor:  
-Should FetcherOrderedGrouped directly call ShuffleUtils.constructBaseURIForShuffleHandler
instead of going via another redirection (to avoid additional string creation in for host
+ ":" + port)


> Shuffle string handling adds significant memory overhead
> --------------------------------------------------------
>
>                 Key: TEZ-3115
>                 URL: https://issues.apache.org/jira/browse/TEZ-3115
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Jason Lowe
>            Assignee: Jonathan Eagles
>         Attachments: TEZ-3115.1.patch, TEZ-3115.2.patch
>
>
> While investigating the OOM heap dump from TEZ-3114 I noticed that the ShuffleManager
and other shuffle-related objects were holding onto many strings that added up to over a hundred
megabytes of memory.



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