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From "Frank-Ralph Reiser (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-2634) CLOB performance partially very poor on linux system
Date Thu, 10 May 2007 13:34:15 GMT
CLOB performance partially very poor on linux system
----------------------------------------------------

                 Key: DERBY-2634
                 URL: https://issues.apache.org/jira/browse/DERBY-2634
             Project: Derby
          Issue Type: Improvement
          Components: Network Client, Network Server, Performance
    Affects Versions: 10.2.2.0, 10.3.0.0
         Environment: gnu linux, network client and network server on the same machine
            Reporter: Frank-Ralph Reiser


Doing some performance tests with several differente database implementations, we noticed
very poor query performance of apache derby under certain conditions.
If the select statement selects a CLOB column and if it contains a subselect, traversing the
ResultSet takes very long with nearly no cpu load.


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