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From "Vikram Dixit K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3996) Correctly enforce the memory limit on the multi-table map-join
Date Tue, 02 Apr 2013 20:35:16 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620249#comment-13620249
] 

Vikram Dixit K commented on HIVE-3996:
--------------------------------------

https://reviews.apache.org/r/9358/

Thanks
Vikram.
                
> Correctly enforce the memory limit on the multi-table map-join
> --------------------------------------------------------------
>
>                 Key: HIVE-3996
>                 URL: https://issues.apache.org/jira/browse/HIVE-3996
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 0.11.0
>            Reporter: Vikram Dixit K
>            Assignee: Vikram Dixit K
>         Attachments: HIVE-3996_2.patch, HIVE-3996_3.patch, HIVE-3996_4.patch, HIVE-3996_5.patch,
HIVE-3996_6.patch, HIVE-3996.patch
>
>
> Currently with HIVE-3784, the joins are converted to map-joins based on checks of the
table size against the config variable: hive.auto.convert.join.noconditionaltask.size. 
> However, the current implementation will also merge multiple mapjoin operators into a
single task regardless of whether the sum of the table sizes will exceed the configured value.

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