Hi all, Here are my observation data from OpenUSS.org: - Hardware: 256 MB memory, Pentium 300 Mhz, 15 GB harddisk. - Software: Windows NT 4, JDK 1.2.2 Sun, JOnAS 2.2.7, RMI, InteServer 2.0 (JDBC) for InterBase 6.0.1 - Operation: Heavy load of BLOBs for OpenUSS: as I told the list before: Until now we are handling about 250 - 300 students with this system simultaneously. They use this system very often and intensively - especially for downloading the lecture materials. - Starting JVM with -Xmx170m. - EJB: Using only "Stateless SB" and "CMP EB" --> "Facade Pattern" is used all over. - Crash: 2 - 3 days without re-starting the JOnAS server: Out of Memory and it also crashs the JVM. without -Xmx128m it crashs sooner than 2 days. - All of the codes of OpenUSS are available --> dev-lecture is the module name for the lecture materials (Open Source - SourceForge). All of the EJBs are under the business objects directory. But there is nothing special there. All of the BLOBs are having their own EJB (CMP) and separately saved. I call this "BLOB Pattern". So if I need a list of files available, I won't get all of the BLOBs automatically (I tried this once, and JOnAS directly crash with: out of memory ;-)). Imagine the list of 30 files with each 2 MB == 60 MB just for one list! And it seems that JOnAS cannot handle such a big EJBs (CMP) (Maybe this is the best way to test JOnAS load power...? ;-)) If you klick the file to download, it will then call the EJB and get the file's content and send it back to the presentation layer. I attach an UML diagram about this architecture. Okay, I hope this helps... Just tell me, what I can do for you to help you find the memory leak of JOnAS. I like the idea of Enhydra Enterprise, that's why until now I haven't really tried to port OpenUSS's EJBs to JBoss. I'm planning in the future to switch to Enhydra Enterprise 4. Thanks a lot! -- --------------------------------------------------- Blasius Lofi Dewanto --------------------------------------------------- OpenUSS - Open University Support System http://openuss.sourceforge.net --------------------------------------------------- E-Mail : [EMAIL PROTECTED] ICQ : 39343280 --------------------------------------------------- > I am working with Lutris on Enhydra Enterprise and have started doing > extensive load tests on JOnAS EJB container. As far as I know, we have > not hit the memory leak problem you are seeing but we would be very > interested in being able to track it down..
