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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-1093) Add a "skew join map join size" variable to control the input size of skew join's following map join job.
Date Mon, 25 Jan 2010 04:44:34 GMT
Add a "skew join map join size" variable to control the input size of skew join's following
map join job.
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                 Key: HIVE-1093
                 URL: https://issues.apache.org/jira/browse/HIVE-1093
             Project: Hadoop Hive
          Issue Type: Improvement
            Reporter: He Yongqiang


In a test, many skew join key itself >250M size. And the following mapjoin will take several
hours to do a mapjoin for those big skew keys. 
This can be better by using a small map input size for the following map join job.

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