Hi,

we are running an application on JBoss 3.0.5 with some 70 entity beans, 60 session 
beans and currently around 1500 JMS queues on a Solaris 8,
machine with a 1.4.1_02 Sun HotSpot Client JVM. 

Some important memory VM params are set to 
-Xmx3G 
-Xms2G
-Xss512M

When the app has around 600 threads going the OutOfMemoryError shown in the subject 
appears. How is it possible to increase the total possible number of threads in terms 
of OS or JVM settings? As an alternative, how do we reduce the number of threads JBoss 
uses. What are the most worthwhile settings to test? Decrease the session bean pool 
size? Use the secondary cache for the message queues earlier in contrast to holding 
all or most messages in heap memory?

Thanks for your insights.

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