Newbie JRockit/64 bit questions

Question

Hello,
We are developing a Java application that needs to have a large memory mapped file (total of 8-10GB). With Windows 32 / Sun JDK we can map about 1.5GB max so we are looking for other alternative such as JRockit for 64 bit architectures.
I have no experience with 64 bit architectures so any help will be greatly appreciated:
1. What 64bit operating systems and architectures (CPU’s models) are supported by JRockit ?
2.     Does JRockit for 64 bit architectures allow to memory map files of arbitrary size (e.g. 16GB) ?
3. Any recommendation for hardware/operating system to use with JRockit 64 (our system is cost sensitive, so hardware/memory cost does matter )?
4. I presume that JRockit 64 can run standard Java applications/binaries (e.g. Tomcat) with no need to recompile them, right?
5. Anything else you can share with your experience of running JRockit 64 bit ?
Thanks,
Zapta

Answer 1

1. What 64bit operating systems and architectures
(CPU’s models) are supported by JRockit ?See http://e-docs.bea.com/wljrockit/docs50/certif.html
2. Does JRockit for 64 bit architectures allow to
memory map files of arbitrary size (e.g. 16GB) ?Yes.
3. Any recommendation for hardware/operating system
to use with JRockit 64 (our system is cost sensitive,
so hardware/memory cost does matter )?Sorry, I can't make any recommendations. See the list of supported hardware above to have a starting point.
4. I presume that JRockit 64 can run standard Java
applications/binaries (e.g. Tomcat) with no need to
recompile them, right?This is true as long as the application does not use native libraries that are compiled for 32-bit hardware.
5. Anything else you can share with your experience of
running JRockit 64 bit ?Here is an article that might be interesting: http://dev2dev.bea.com/pub/a/2004/01/jrockit_intel.html
Regards,
/Staffan