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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-3251) Bzip2TextInputFormat requires double the memory of maximum record size
Date Wed, 20 Mar 2013 17:07:15 GMT

    [ https://issues.apache.org/jira/browse/PIG-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607860#comment-13607860
] 

Koji Noguchi commented on PIG-3251:
-----------------------------------

bq. With HADOOP-7823, can we remove Bzip2TextInputFormat and just use PigTextInputFormat?
That'll (almost) have the same effect of my initial patch pig-3251-trunk-v01.patch which takes
to status (2) in my previous comment.  With HADOOP-7823 + HADOOP-6109, then it'll be (3).
Without a doubt, HADOOP-7823 + HADOOP-6109 is the cleanest approach.


                
> Bzip2TextInputFormat requires double the memory of maximum record size
> ----------------------------------------------------------------------
>
>                 Key: PIG-3251
>                 URL: https://issues.apache.org/jira/browse/PIG-3251
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Koji Noguchi
>            Assignee: Koji Noguchi
>            Priority: Minor
>         Attachments: pig-3251-trunk-v01.patch, pig-3251-trunk-v02.patch
>
>
> While looking at user's OOM heap dump, noticed that pig's Bzip2TextInputFormat consumes
memory at both
> Bzip2TextInputFormat.buffer (ByteArrayOutputStream) 
> and actual Text that is returned as line.
> For example, when having one record with 160MBytes, buffer was 268MBytes and Text was
160MBytes.  
> We can probably eliminate one of them.

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