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From "Sam Pullara (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-40) Memory management in BigDataBag is probably wrong
Date Fri, 30 Nov 2007 00:11:43 GMT
Memory management in BigDataBag is probably wrong
-------------------------------------------------

                 Key: PIG-40
                 URL: https://issues.apache.org/jira/browse/PIG-40
             Project: Pig
          Issue Type: Bug
          Components: impl
            Reporter: Sam Pullara


src/org/apache/pig/data/BigDataBag.java

1) You should not use finalizers for things other than external resources -- using them here
is very dangerous and could inadvertantly lead to deadlocks and object resurrection and just
decreases performance without any advantage.
2) Using .freeMemory() the way it is used in this class is broken.  freeMemory() is going
to return a mostly random number between 0 and the real amount.  Adding gc() in here is a
terrible performance burden.  If you really want to do something like this you should using
softreferences and finalization queues.


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