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https://issues.apache.org/jira/browse/HIVE-170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Namit Jain updated HIVE-170:
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Status: Open (was: Patch Available)
> map-side aggregations does not work properly
> --------------------------------------------
>
> Key: HIVE-170
> URL: https://issues.apache.org/jira/browse/HIVE-170
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: 170.patch, patch2
>
>
> map-side aggregation depends on runtime.freememory() which is not guaranteed
> to return the freeable memory - it depends on when the garbage collector is
> invoked last.
> It might be a good idea to estimate the number of rows that can fit in the
> hash table and then flush the hash table based on that
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