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From "Liu, Ming (Ming)" <ming....@esgyn.cn>
Subject 答复: [jira] [Created] (TRAFODION-1971) Redundant initialization slows down bulk load
Date Wed, 04 May 2016 23:41:27 GMT
Increadible!!

-----邮件原件-----
发件人: Barry Fritchman (JIRA) [mailto:jira@apache.org] 
发送时间: 2016年5月5日 2:47
收件人: issues@trafodion.incubator.apache.org
主题: [jira] [Created] (TRAFODION-1971) Redundant initialization slows down bulk load

Barry Fritchman created TRAFODION-1971:
------------------------------------------

             Summary: Redundant initialization slows down bulk load
                 Key: TRAFODION-1971
                 URL: https://issues.apache.org/jira/browse/TRAFODION-1971
             Project: Apache Trafodion
          Issue Type: Bug
          Components: sql-exe
    Affects Versions: 2.0-incubating
            Reporter: Barry Fritchman


During the preparation phase of bulk load, HFIle parameter initialization is performed redundantly
following each flush. For a 52-million row table with fairly wide rows, a load takes 3.5 hours
vs 35-40 minutes when the unnecessary re-initialization is avoided.



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