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Posted to mapreduce-issues@hadoop.apache.org by "Luke Lu (JIRA)" <ji...@apache.org> on 2012/07/05 12:33:34 UTC

[jira] [Commented] (MAPREDUCE-4400) Fix performance regression for small jobs/workflows

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406969#comment-13406969 ] 

Luke Lu commented on MAPREDUCE-4400:
------------------------------------

Thanks to John Poelman and Shreyas Subramanya of IBM BigInsights performance QA for noticing the issue and verifying my fix.
                
> Fix performance regression for small jobs/workflows
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-4400
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4400
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task
>    Affects Versions: 0.20.203.0, 1.0.3
>            Reporter: Luke Lu
>            Assignee: Luke Lu
>
> There is a significant performance regression for small jobs/workflows (vs 0.20.2) in the Hadoop 1.x series. Most noticeable with Hive and Pig jobs. PigMix has an average 40% regression against 0.20.2.

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