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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-502) Optimize RCFile's performance by removeing all synchronized modifiers
Date Fri, 22 May 2009 05:38:45 GMT

     [ https://issues.apache.org/jira/browse/HIVE-502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

He Yongqiang updated HIVE-502:
------------------------------

    Attachment: hive-502-2009-05-22.patch

Fix a typo in class HiveDataInputBuffer's comment. Thanks, Zheng.

> Optimize RCFile's performance by removeing all synchronized modifiers
> ---------------------------------------------------------------------
>
>                 Key: HIVE-502
>                 URL: https://issues.apache.org/jira/browse/HIVE-502
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: He Yongqiang
>            Assignee: He Yongqiang
>         Attachments: hive-502-2009-05-21.patch, hive-502-2009-05-22.patch
>
>
> Tests by Zheng and me both show that removing all synchronized modifiers can improve
RCFile's performance by  about 15+%.
> This will make RCFile's reader and writer not thread safe any longer. This will be ok,since
hive always does its work in single thread.

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