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  1. Hive
  2. HIVE-20364

Update default for hive.map.aggr.hash.min.reduction

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 4.0.0-alpha-1
    • Configuration
    • None

    Description

      Default value is 0.5 Lets update it to 0.99
      In average case its a trade-off between cpu vs network. Erring on side of CPU is better since perf loss caused by network is usually larger.

      Attachments

        1. HIVE-20364.patch
          2 kB
          Ashutosh Chauhan

        Issue Links

          is superceded by

          Bug - A problem which impairs or prevents the functions of the product. HIVE-20656 Sensible defaults: Map aggregation memory configs are too aggressive

          • Major - Major loss of function.
          • Closed

          Activity

            People

              ashutoshc Ashutosh Chauhan
              ndembla Nita Dembla
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              Dates

                Created:
                Updated:
                Resolved: