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  1. Hive
  2. HIVE-3086

Skewed Join Optimization

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    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.10.0
    • Component/s: Query Processor
    • Labels:
      None

      Description

      During a join operation, if one of the columns has a skewed key, it can cause that particular reducer to become the bottleneck. The following feature will address it:
      https://cwiki.apache.org/confluence/display/Hive/Skewed+Join+Optimization

        Attachments

        1. hive.3086.1.patch
          251 kB
          Namit Jain
        2. hive.3086.2.patch
          252 kB
          Namit Jain
        3. hive.3086.3.patch
          338 kB
          Namit Jain
        4. hive.3086.4.patch
          338 kB
          Namit Jain
        5. hive.3086.5.patch
          354 kB
          Namit Jain
        6. hive.3086.6.patch
          355 kB
          Namit Jain

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              • Assignee:
                namit Namit Jain
                Reporter:
                nadeemoidu Nadeem Moidu
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                Dates

                • Created:
                  Updated:
                  Resolved: