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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-8496) Re-enable statistics [Spark Branch]
Date Sun, 19 Oct 2014 00:28:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14176183#comment-14176183
] 

Xuefu Zhang edited comment on HIVE-8496 at 10/19/14 12:28 AM:
--------------------------------------------------------------

[~csun], it seems that your change will stop MR from generating statistics.


was (Author: xuefuz):
[~csun], it seems that your change will stop MR to generate statistics.

> Re-enable statistics [Spark Branch]
> -----------------------------------
>
>                 Key: HIVE-8496
>                 URL: https://issues.apache.org/jira/browse/HIVE-8496
>             Project: Hive
>          Issue Type: Bug
>          Components: Spark
>            Reporter: Chao
>            Assignee: Chao
>         Attachments: HIVE-8496.1-spark.patch
>
>
> {{AnnotatedWithStatistics}} is not activated due to a recent merge, and hence the {{SetSparkReducerParallelism}}
is not activated either. This caused Hive to always use one reducer. We should re-enable statistics.



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