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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8496) Re-enable statistics [Spark Branch]
Date Sun, 19 Oct 2014 05:17:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14176222#comment-14176222
] 

Xuefu Zhang commented on HIVE-8496:
-----------------------------------

Okay. I see your point. Then, for Spark, even it's not explain, it will still do statistic
collection. I don't quite understand the change, and let's talk about it Monday.

> 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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