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https://issues.apache.org/jira/browse/HIVE-1832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12967268#action_12967268
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Liyin Tang commented on HIVE-1832:
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Duplicate of Hive-1830
> Dynamically allocate and measure memory usage when a map join op followed by
> a group by op
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-1832
> URL: https://issues.apache.org/jira/browse/HIVE-1832
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Liyin Tang
> Assignee: Liyin Tang
>
> Right now, if a map join operator followed by a map-side group by, this map
> reduce task will be memory intensive task.
> Memory usage should be carefully measured and bounded in order not to run out
> of memory.
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