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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HIVE-17276) Check max shuffle size when converting to dynamically partitioned hash join
Date Wed, 09 Aug 2017 00:24:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-17276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HIVE-17276 started by Jesus Camacho Rodriguez.
------------------------------------------------------
> Check max shuffle size when converting to dynamically partitioned hash join
> ---------------------------------------------------------------------------
>
>                 Key: HIVE-17276
>                 URL: https://issues.apache.org/jira/browse/HIVE-17276
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>    Affects Versions: 3.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>
> Currently we only check that the max number of entries in the hashmap for a MapJoin surpasses
a certain threshold to decide whether to execute a dynamically partitioned hash join.
> We would like to factor the size of the large input that we will shuffle for the dynamically
partitioned hash join into the cost model too.



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