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Posted to dev@pig.apache.org by "Alan Gates (JIRA)" <ji...@apache.org> on 2012/09/14 22:48:08 UTC

[jira] [Commented] (PIG-2918) Avoid Spillable bag overhead where possible

    [ https://issues.apache.org/jira/browse/PIG-2918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456125#comment-13456125 ] 

Alan Gates commented on PIG-2918:
---------------------------------

Patch looks good.  I'm running it through some of the e2e tests.
                
> Avoid Spillable bag overhead where possible
> -------------------------------------------
>
>                 Key: PIG-2918
>                 URL: https://issues.apache.org/jira/browse/PIG-2918
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Dmitriy V. Ryaboy
>            Assignee: Dmitriy V. Ryaboy
>         Attachments: PIG-2918.patch
>
>
> We use BagFactory.newDefaultBag() liberally, and pay a price -- each such bag registers with the spillable memory manager, and if we allocate a lot of tiny bags, we wind up paying for maintaining and cleaning up the internal linked list of weak references. 
> In many cases, we know a-priori that the bags are smal, and should probably be creating non-spillable bags for those cases.

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