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https://issues.apache.org/jira/browse/HADOOP-3352?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mukund Madhugiri updated HADOOP-3352:
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Fix Version/s: (was: 0.18.0)
> Reduce the number of progress calls in the merge code
> -----------------------------------------------------
>
> Key: HADOOP-3352
> URL: https://issues.apache.org/jira/browse/HADOOP-3352
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Devaraj Das
> Assignee: Devaraj Das
>
> The number of Progressable.progress calls in the merge code should be
> reduced. Specifically, MergeQueue.lessThan has a progress call that accounts
> for ~8% of the CPU of a running reducer.
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