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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6735) Performance degradation caused by MAPREDUCE-5465 and HADOOP-12107
Date Wed, 20 Jul 2016 16:25:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15386142#comment-15386142
] 

Jason Lowe commented on MAPREDUCE-6735:
---------------------------------------

It would also be good to know more details on the baseline being used when these commits are
added/removed so we know what other changes are present/absent.  Is this a 2.8 baseline with
reverts on these two commits or something else?

> Performance degradation caused by MAPREDUCE-5465 and HADOOP-12107
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-6735
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6735
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Alexandr Balitsky
>
> Two commits, MAPREDUCE-5465 and HADOOP-12107 are making Terasort on YARN 10% slower.
> Reduce phase with those commits ~5 mins
> Reduce phase without ~3.5 mins
> Average Reduce is taking 4mins, 16sec with those commits compared to 3mins, 48sec without.



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