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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3352) Reduce the number of progress calls in the merge code
Date Tue, 06 May 2008 12:46:55 GMT
Reduce the number of progress calls in the merge code
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                 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
             Fix For: 0.18.0


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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