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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2018/08/10 20:47:00 UTC

[jira] [Created] (HIVE-20364) Update default for hive.map.aggr.hash.min.reduction

Ashutosh Chauhan created HIVE-20364:
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             Summary: Update default for hive.map.aggr.hash.min.reduction
                 Key: HIVE-20364
                 URL: https://issues.apache.org/jira/browse/HIVE-20364
             Project: Hive
          Issue Type: Improvement
          Components: Configuration
            Reporter: Nita Dembla
            Assignee: Ashutosh Chauhan


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.



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