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https://issues.apache.org/jira/browse/MAPREDUCE-4400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luke Lu resolved MAPREDUCE-4400.
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Tags: task, performance
Resolution: Fixed
Fix Version/s: 1.1.1
Hadoop Flags: Reviewed
Thanks for the review and +1, Shrinivas and Tom! Created MAPREDUCE-4477 to
track trunk improvement. Committed the change to branch-1 and branch-1.1. It's
not in 1.1.0-rc1 though.
> 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: performance, task
> Affects Versions: 0.20.203.0, 1.0.3
> Reporter: Luke Lu
> Assignee: Luke Lu
> Fix For: 1.1.1
>
> Attachments: mapreduce-4400-branch-1.patch
>
>
> 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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