> From: Hans Magne Helland [mailto:hansma...@gmail.com] 
> Subject: Re: apache-tomcat-6.0.29 will not start with more then 1024mb memory 
> assigned - windows

> This tomcat server is running an ARS Remedy Mid-Tier application
> (version 7.5), the requirements from BMC on this version is that it
> must be a 32bit tomcat install using a 32bit java.

Since I'm not familiar with BMC's products, that didn't really answer the 
question: does the webapp include native code?  If not, then the webapp won't 
be able to tell the difference between 32- and 64-bit JVMs.  Have you tried 
running it on a 64-bit JVM?

> So 1024mb looks to be the limit on a 32bit java/tomcat install?

The exact limit varies depending on the details of the process.  Native code 
inside the JVM process may well limit the amount of contiguous virtual space 
remaining that the heap has to fit into.  There are configuration options for 
32-bit Windows to allow a 3 GB process space instead of the normal 2 GB, but 
that puts other constraints on the OS.  Not sure what can be done on a 64-bit 
Windows, since the expectation is that serious apps will be using 64-bit 
processes.

 - Chuck


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