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From "pengcheng xiong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-7736) improve the columns stats update speed for all the partitions of a table
Date Thu, 21 Aug 2014 18:15:11 GMT

     [ https://issues.apache.org/jira/browse/HIVE-7736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

pengcheng xiong updated HIVE-7736:
----------------------------------

    Status: Patch Available  (was: Open)

wait for QA tests

> improve the columns stats update speed for all the partitions of a table
> ------------------------------------------------------------------------
>
>                 Key: HIVE-7736
>                 URL: https://issues.apache.org/jira/browse/HIVE-7736
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: pengcheng xiong
>            Assignee: pengcheng xiong
>            Priority: Minor
>         Attachments: HIVE-7736.0.patch, HIVE-7736.1.patch, HIVE-7736.2.patch, HIVE-7736.3.patch,
HIVE-7736.4.patch
>
>
> The current implementation of columns stats update for all the partitions of a table
takes a long time when there are thousands of partitions. 
> For example, on a given cluster, it took 600+ seconds to update all the partitions' columns
stats for a table with 2 columns but 2000 partitions.
> ANALYZE TABLE src_stat_part partition (partitionId) COMPUTE STATISTICS for columns;
> We would like to improve the columns stats update speed for all the partitions of a table



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