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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