jrun hogging memory

I have figured out what our problem was.. It's related to an application that reads in and parses large xml documents.  If I try running the page several times quickly the memory shoots right up. - Alex I have CF8 Enterprise on a windows 2003 server.  I check the jrun memory usage in the task manager and it keeps climbing and climbing. Eventually out cfdocument pdf's stop working and I have to stop and restart coldfusion to get it to clear the memory and work again.  I checked the JVM while this is happening and it looks ok....maybe using 200 megs.  The Jrun.exe process will get to 800- 900 megs before the cfdocument pdf's stop working.  Any ideas ?? What else is stored in jrun's memory space that's outside the jvm ??  Has anyone else had this problem ?