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Posted to issues@hive.apache.org by "Dmitry Tolpeko (JIRA)" <ji...@apache.org> on 2017/08/29 17:45:00 UTC

[jira] [Updated] (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

     [ https://issues.apache.org/jira/browse/HIVE-14160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitry Tolpeko updated HIVE-14160:
----------------------------------
    Component/s:     (was: hpl/sql)

> 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
>    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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