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https://issues.apache.org/jira/browse/HIVE-12329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15026080#comment-15026080
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Lefty Leverenz commented on HIVE-12329:
---------------------------------------

Doc note:  This changes the default value and description of 
*hive.limit.pushdown.memory.usage* which was introduced by HIVE-3562 in release 
0.12.0.  It needs to be updated in the wiki:

* [Configuration Properties -- hive.limit.pushdown.memory.usage | 
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.limit.pushdown.memory.usage]

*hive.limit.pushdown.memory.usage* is also mentioned in Hive on Spark: Getting 
Started but doesn't seem to need revision there -- it just shows a recommended 
value of 0.4:

* [Hive on Spark: Getting Started -- Recommended Configuration | 
https://cwiki.apache.org/confluence/display/Hive/Hive+on+Spark:+Getting+Started#HiveonSpark:GettingStarted-RecommendedConfiguration]

> Turn on limit pushdown optimization by default
> ----------------------------------------------
>
>                 Key: HIVE-12329
>                 URL: https://issues.apache.org/jira/browse/HIVE-12329
>             Project: Hive
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>              Labels: TODOC2.0
>             Fix For: 2.0.0
>
>         Attachments: HIVE-12329.2.patch, HIVE-12329.patch
>
>
> Whenever applicable, this will always help, so this should be on by default.



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