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Posted to dev@hive.apache.org by "Jeff Hammerbacher (JIRA)" <ji...@apache.org> on 2009/09/12 08:26:57 UTC

[jira] Commented: (HIVE-827) increase hive.mapjoin.cache.numrows default value

    [ https://issues.apache.org/jira/browse/HIVE-827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12754488#action_12754488 ] 

Jeff Hammerbacher commented on HIVE-827:
----------------------------------------

For posterity, why does the value of 10,000 lead to bad performance?

> increase hive.mapjoin.cache.numrows default value
> -------------------------------------------------
>
>                 Key: HIVE-827
>                 URL: https://issues.apache.org/jira/browse/HIVE-827
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>         Attachments: hive.827.1.patch
>
>
> Currently, it is 10000 and leads to bad performance

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