there wasn't a limit of 32 bits OS for running JVM for more than 1.5 Gb? Regards,
Miguel ________________________________ De: André Warnier <a...@ice-sa.com> Para: Tomcat Users List <users@tomcat.apache.org> Enviado: Miércoles 16 de Mayo de 2012 11:50 Asunto: Re: two instances of Tomcat in same machine Miguel Gonzalez wrote: > Just wondering. With a 64 bits OS, how much RAM can you handle in a JVMand > therefore with each instance of Tomcat? > > For a 12 Gb of RAM machine, it would be wise if you want to have this kind of > setup (Apache and two Tomcat instances in the same machine) if you need more > than 400-500 concurrent users? > Nobody can answer that question in the absolute. It all depends on how much memory your Tomcat instances really need, to run the applications you put it them, for the number of requests you expect to be handled. And won what else on that machine needs memory, and how much memory that machine has. Tomcat can run in as little as 512KB (or less). The other end is unlimited.. The benefit of a 64-bit OS compared to a 32-bit OS, is that you can allocate more memory *per process*. A drawback of running an application in 64-bit mode - compared to running the same in 32-bit mode - is that under 64-bit mode, some things will use up 64 bits instead of 32 bits. So you roughly use about 30% more memory, to run the exact same application. But that also depends very much on the application. In other words : try it and see. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
