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Posted to dev@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2019/03/06 22:48:01 UTC

[jira] [Created] (HIVE-21399) Adjust hive.map.aggr.hash.min.reduction statically depending on group by statistics

Jesus Camacho Rodriguez created HIVE-21399:
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             Summary: Adjust hive.map.aggr.hash.min.reduction statically depending on group by statistics
                 Key: HIVE-21399
                 URL: https://issues.apache.org/jira/browse/HIVE-21399
             Project: Hive
          Issue Type: Improvement
          Components: Hive
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


Currently, the value is set statically from config variable. If stats are available, we could try to adjust this value at optimization time to favor turning off hash aggregation earlier.



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