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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-963) no out of memory errors for skewed join
Date Wed, 02 Dec 2009 02:03:20 GMT
no out of memory errors for skewed join

                 Key: HIVE-963
                 URL: https://issues.apache.org/jira/browse/HIVE-963
             Project: Hadoop Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Namit Jain
            Assignee: He Yongqiang

Currently, in case of skew, hive runs out of memory.
A simpler fix would be to use JDBM to store data and use that.

It can be configurable and JDBM should only be triggered if the number of values for a given
key exceed a given number.

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