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Posted to dev@hive.apache.org by "marymwu (JIRA)" <ji...@apache.org> on 2016/07/05 11:26:10 UTC

[jira] [Created] (HIVE-14160) Reduce-task costs a long time to finish on the condition that the certain sql "select a,distinct(b) group by a" has been executed on the data which has skew distribution

marymwu created HIVE-14160:
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             Summary: Reduce-task costs a long time to finish on the condition that the certain sql "select a,distinct(b) group by a" has been executed on the data which has skew distribution
                 Key: HIVE-14160
                 URL: https://issues.apache.org/jira/browse/HIVE-14160
             Project: Hive
          Issue Type: Improvement
          Components: hpl/sql
    Affects Versions: 1.1.0
            Reporter: marymwu


Reduce-task costs a long time to finish on the condition that the certain sql "select a,distinct(b) group by a" has been executed on the data which has skew distribution

data scale: 64G



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