[jboss-user] [Installation, Configuration & Deployment] - VM-Size in Windows task manager increases constantly
do-not-reply at jboss.com
Wed Jul 19 04:51:31 EDT 2006
I got a big problem. Please give me some hints how to solve it. I read a lot of threads about it here, but no solution.
My system is:
P IV, 4GB mem (no swap to not delay the problem)
Windows 2003 Server x64
SUN JDK 1.5.0-07 for AMD x64
My own stateful session bean and two servlets of my own
set JAVA_OPTS=%JAVA_OPTS% -Xms2048m -Xmx2048m
set JAVA_OPTS=%JAVA_OPTS% -XX:PermSize=150m -XX:NewRatio=3
My problem is:
To stress test my bean I create approximately 600 instances. One hour after the start the windows task manager tells me a VM-Size of 2.5 GB. That?s okay. Visual GC 3.0 tells me the following:
PermSize: 50MB (ok)
OldGen: 300MB (ok) (after 2 collections)
Survivor ½: 130MB (ok)
Eden: 170MB (ok)
Everything is okay.
After 30 hours Visual GC:
PermSize: 50MB (ok)
OldGen: 300MB (ok) (after 500 collections)
Survivor ½: 8MB (interesting, but still ok for me)
Eden: 33MB (interesting, but still ok for me)
The Problem is now windows task manager for java.exe
MemUsage: 1.6GB (ok)
PeakMemIsage: 1.6GB (ok)
VM Size 3.5GB (and increasing: very big problem)
When VM-Size reaches 3.8GB, java.exe crashes.
IMHO JVM?s internal heaps are okay but there must be an internal error in its memory management. It?s not that I want memory returned to the OS but the JVM should detect a lack of fresh memory and not allocate anymore.
I also think that there is no benefit in changing Xms Xmx Xss (the well known switches). I tried without success.
Is it possible that this is a special problem of the x64 JVM? With 32 Bit I run onto other limitation.
Any help is welcome
Thanks in advance.
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