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https://issues.apache.org/jira/browse/MAPREDUCE-6105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14363945#comment-14363945
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Ray Chiang commented on MAPREDUCE-6105:
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Thanks for the review and commit!
> Inconsistent configuration in property mapreduce.reduce.shuffle.merge.percent
> -----------------------------------------------------------------------------
>
> Key: MAPREDUCE-6105
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6105
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.4.0, 2.4.1
> Reporter: Dongwook Kwon
> Assignee: Ray Chiang
> Priority: Trivial
> Labels: newbie
> Fix For: 2.8.0
>
> Attachments: MAPREDUCE-6105-01.patch, MAPREDUCE-6105.patch
>
>
> Similar to MAPREDUCE-5906, In MergeManagerImpl.java, the default value of
> MRJobConfig.SHUFFLE_MERGE_PERCENT(mapreduce.reduce.shuffle.merge.percent)
> should be 0.66
> According to official doc.
> https://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml
> {code}
> this.mergeThreshold = (long)(this.memoryLimit *
> jobConf.getFloat(MRJobConfig.SHUFFLE_MERGE_PERCENT,
> 0.90f));
> {code}
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