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https://issues.apache.org/jira/browse/HIVE-12656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15424081#comment-15424081
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Lefty Leverenz commented on HIVE-12656:
---------------------------------------

Doc note:  This changes the default value of *hive.compute.query.using.stats* 
in release 2.2.0, so the wiki will need to be updated.

* [Configuration Properties -- hive.compute.query.using.stats | 
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.compute.query.using.stats]

For an example of how to document a changed default value, see:

* [Configuration Properties -- hive.metastore.execute.setugi | 
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.metastore.execute.setugi]

Added a TODOC2.2 label.

> Turn hive.compute.query.using.stats on by default
> -------------------------------------------------
>
>                 Key: HIVE-12656
>                 URL: https://issues.apache.org/jira/browse/HIVE-12656
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.1.0
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>              Labels: TODOC2.2
>             Fix For: 2.2.0
>
>         Attachments: HIVE-12656.01.patch, HIVE-12656.02.patch, 
> HIVE-12656.03.patch, HIVE-12656.04.patch, HIVE-12656.05.patch
>
>
> We now have hive.compute.query.using.stats=false by default. We plan to turn 
> it on by default so that we can have better performance. We can also set it 
> to false in some test cases to maintain the original purpose of those tests..



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