[jira] [Commented] (PIG-3251) Bzip2TextInputFormat requires double the memory of maximum record size

["Daniel Dai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13605874#comment-13605874 ] 

Daniel Dai commented on PIG-3251:
---------------------------------

Looks good. Seems the reason why we use ByteArrayOutputStream before is to get auto-expand byte array for free, which Pig can manage by itself to reduce the memory foot print. Let me know if you find any problem in your testing.
                
> 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
>
>
> 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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