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multiple instances of JBoss on same machine

 
Greenhorn
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I knew I can set up multiple instances of JBoss on the same machine. What are pros and cons of this setting?
 
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I can't see any reason to do this outside of QA/dev testing. Perhaps you are hoping that you can better utilize the resources of the machines by running multiple JVMs?
 
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Resource utilization is a very real reason to use multiple VM's as the JVM can't get more than about 1.6 Gig usually on Intel and 3.6 Gig on Solaris/Sparc boxes. If you have more RAM and CPU you put more VM's on the box. Here's a link to an article that explains more about the VM issues.

http://www.unixville.com/~moazam/


Anyway,
 
norman richards
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The solution for the memory problem is to use a 64-bit JVM. This is really a big deal. More memory == big caches == very very good.
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