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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1184) mapred.reduce.slowstart.completed.maps is too high by default
Date Thu, 05 Nov 2009 04:02:32 GMT
mapred.reduce.slowstart.completed.maps is too high by default
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                 Key: MAPREDUCE-1184
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1184
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
            Reporter: Allen Wittenauer


By default, this value is set to 5%.  I believe for most real world situations the code isn't
efficient enough to be set this low.  This should be higher, probably around the 50% mark,
especially given the predominance of non-FIFO schedulers.

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