[jira] Commented: (HIVE-1832) Dynamically allocate and measure memory usage when a map join op followed by a group by op

["Liyin Tang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-1832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12967268#action_12967268 ] 

Liyin Tang commented on HIVE-1832:
----------------------------------

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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