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Re: IDL memory limitation? [message #45485 is a reply to message #45477]

Thu, 15 September 2005 08:26

R.G. Stockwell
Messages: 363
Registered: July 1999

Senior Member

"IDLmastertobe" <shi_lee@hotmail.com> wrote in message
news:350f4523765a1e1dc7f21a03bc5e7f17@localhost.talkaboutpro gramming.com...
> Hi, I am trying to visualize some 3D data using IDL and I found when my
> data size grow big, the program runs out of memory and won't work.
> Indeed, the data size is not too big yet, it is about 50MB max while some
> of my other data could be on the level of few or more GigaBytes in the
> future. Does anyone have any idea if IDL has any certain limitations on
> memory allocation? Thank you.
>

Yes, there are "extreme" limitations on IDL memory allocation.
Under windows, it is pretty tough, as windows sprays dlls all through
your ram, making the largest contiguous piece pretty small (I could
only make a 700 mb array, and 2gb is the absolute max a process
can access under windows).

Your much better off in under *nix, under fedora core 4 I can
allocate almost all 4 gigs of ram, with the largest arrays being
just over a gig. (4 gig being the max under 32 bit OS)

I don't know the status of 64 bit idl, but I think it is available.
If you need huge memory allocations, definitely look at a
new 64 bit computer, 64 bit os, and 64 bit IDL .

Cheers,
bob

PS there was a thread titled memory issues redux
that discussed this.

(link to groups.google below)
http://tinyurl.com/a2r5q

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[Message index]

		Re: IDL memory limitation? By: Karl Schultz on Thu, 15 September 2005 15:12
		Re: IDL memory limitation? By: Mark Hadfield on Thu, 15 September 2005 14:29
		Re: IDL memory limitation? By: R.G. Stockwell on Thu, 15 September 2005 14:20
		Re: IDL memory limitation? By: IDLmastertobe on Thu, 15 September 2005 13:39
		Re: IDL memory limitation? By: Michael Wallace on Thu, 15 September 2005 13:07
		Re: IDL memory limitation? By: IDLmastertobe on Thu, 15 September 2005 12:54
		Re: IDL memory limitation? By: R.G. Stockwell on Thu, 15 September 2005 08:26
		Re: IDL memory limitation? By: David Fanning on Thu, 15 September 2005 05:35
		Re: IDL memory limitation? By: IDLmastertobe on Fri, 16 September 2005 14:18

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