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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-502) Optimize RCFile's performance by removeing all synchronized modifiers
Date Thu, 21 May 2009 09:30:45 GMT
Optimize RCFile's performance by removeing all synchronized modifiers
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                 Key: HIVE-502
                 URL: https://issues.apache.org/jira/browse/HIVE-502
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: He Yongqiang


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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