> As far as loading the JVM into memory 25 times - if I have each instance 
> running in their own memory space then doesn't that JVM just load up
> in that memory space and not encroach upon the memory of the other instances?

They won't share each other's memory, but they'd consume the memory of
the server in which they're run, and that can be expensive. 25
instances is a lot. If each instance had 1GB RAM, you'd need a server
with more than 25GB RAM, and the ability to support that amount of RAM
(presumably a 64-bit OS). And in a 64-bit OS, you might need more than
1GB RAM per instance if the applications within those instances
currently use that much memory in a 32-bit environment.

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
http://training.figleaf.com/

Fig Leaf Software is a Veteran-Owned Small Business (VOSB) on
GSA Schedule, and provides the highest caliber vendor-authorized
instruction at our training centers, online, or onsite.

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