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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-3731) Improve calculation of refSize in ClassSize.java
Date Thu, 19 Jun 2008 21:41:45 GMT
Improve calculation of refSize in ClassSize.java 
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                 Key: DERBY-3731
                 URL: https://issues.apache.org/jira/browse/DERBY-3731
             Project: Derby
          Issue Type: Bug
          Components: SQL
            Reporter: Kathey Marsden
            Priority: Minor


java/engine/org/apache/derby/iapi/services/cache/ClassSize.java has a static code block which
calculates the size of a reference for the architecture.  This code could be improved by adding
garbage collection before measuring memory, to give a consistent  reading.     Also there
have been suggestions that we use os.arch or sun.arch.data.model to make the measurement more
reliable, especially on 64bit machines.


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