Virtual Memory on 64-bit Itanium2 w/Windows XP 2003 64-bit

[yood]

Hi. I have an Intel Fortran-based system that would like to use vast amounts (50-gig+) of memory for arrays, etc.

OS: Windows XP 2003 64-bit

System: zx6000 Itanium2 workstation

Disk Space: 2 Partitions - 16 gig each

Memory: 8 gig

Compiler: Intel 8.1

Questions:

1. Must I have physical memory equal to the allocated memory when the programs run?

2. Can I allocate memory in the Fortran program and have the OS handle virtual memory using disk space?

3. Any other suggestions?

Thankx,

Mark Wood

[Steven_L_Intel1]

This should "just work". You don't need matching physical memory, but do need enough swapfile space for backing store. You should be able to do normal allocations in the Fortran program. If you run into any problems, please let us know at Intel Premier Support.

[jparsly]

The total of your memory + disk space has to be bigger than the

amount you will have allocated simultaneously. I couldn't say for sure, but

I would also suspect that only one of your partitions is going to be used for

virtual memory. If you are truely going to be using 50+ gig all at once, you will need a bigger hard drive.

[Steven_L_Intel1]

Right - I missed that you had small disk drives (for nowadays). You absolutely need at least as much disk space for swapfile(s) as you'll use virtual memory.