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  1. Hadoop Map/Reduce
  2. MAPREDUCE-1184

mapred.reduce.slowstart.completed.maps is too low by default

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    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Won't Fix
    • 0.20.1, 0.20.2
    • None
    • None
    • None

    Description

      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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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. MAPREDUCE-1463 Reducer should start faster for smaller jobs

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              aw Allen Wittenauer
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                Created:
                Updated:
                Resolved: