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From "Dmitry Tolpeko (JIRA)" <j...@apache.org>
Subject [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
Date Tue, 29 Aug 2017 17:45:00 GMT

     [ 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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