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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-561) Make Hash aggregation threshold configurable
Date Mon, 15 Jun 2009 23:30:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719853#action_12719853
] 

Namit Jain commented on HIVE-561:
---------------------------------

+1

looks good - I will commit it if the tests pass

> Make Hash aggregation threshold configurable
> --------------------------------------------
>
>                 Key: HIVE-561
>                 URL: https://issues.apache.org/jira/browse/HIVE-561
>             Project: Hadoop Hive
>          Issue Type: Improvement
>    Affects Versions: 0.3.0, 0.3.1
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>            Priority: Minor
>             Fix For: 0.4.0
>
>         Attachments: HIVE-561.1.patch, HIVE-561.2.patch
>
>
> Currently we stop doing Hash aggregation after seeing 100K rows and the reduction is
below 50%. We should make it configurable.

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