Re: Size of Largest Array?

From: David Ham (D.A.Ham_at_CiTG.TUDelft.nl)
Date: 01/30/04 

Date: 30 Jan 2004 19:54:53 +0100

rcl7820@owl.forestry.uga.edu (TLowe) writes:

> Hey Folks,
>
> Can anybody tell me the size of the largest array I can dimension?
> I am using Lahey FORTRAN 90. I was able to dimension and populate
> 4 arrays, each with 100,000,000 elements. When I added another, I
> received an error stating that the compiled executable was not a
> legal Win32 application.
>
> I get the idea that I can only use 2 gigs of memory. I have a machine
> with 6 gigs of memory (running Win 2000 Advanced Server). I want to
> use as much as possible. Can somebody fill me in if there is a switch
> I can use when compiling to let the program use more memory?
>

Sorry, not my platform so I can't directly help. However, might I ask
what you are putting in matrices that large? The reason I ask is that
many very large matrices are actually sparse (ie they have an awful
lot of zero entries) in which case there are storage mechanisms which
use a lot less memory and make processing much faster.

Regards,

David

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