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https://issues.apache.org/jira/browse/HIVE-827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12754827#action_12754827
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Namit Jain commented on HIVE-827:
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What I meant to say is that there is enough memory on the machines to fit more
than 10,000 rows easily - of course, that depends on the row size.
But, based on the mails in the mailing lists, I felt that, a higher default may
be better
> 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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