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Re: Memory linits for Unix IDL [message #10324 is a reply to message #10217]

Thu, 06 November 1997 00:00

Bruce Macintosh
Messages: 5
Registered: March 1997

Junior Member

Stein Vidar Hagfors Haugan wrote:
>
> John Varsik wrote:
>>
>> Is there a limit to how much virtual memory (other than the
>> total amount of swap space) the Unix versions of IDL will use?
>> If so, how do I set it?
>
> Use
>
> unix> limit
>
> to see which limits are available. On e.g., Digital Unix there
> is a limit for "vmemoryuse", which determines the amount of
> virtual memory (i.e., swap space) that may be used.
>
> Stein Vidar

I don't think IDL's use of memory is set just by available
swap space. I've tried running on Sparcs with plenty of swap space
(and vmemoryuse "unlimited" according to limit) but
little physical memory (32 or 64MB), and I can't create more than
a couple of 256x256x100 real arrays before running out of space.
Otherwise-identical machines with 128MB or 256MB can create many more
arrays. IDL seems to be aware in some fashion of how much physical
memory is available, and unwilling to use more than that amount.
(Note that, of course, with many users/processes it'll be forced
to swap anyway...)

Is this documented anywhere?

Bruce Macintosh
bmac@igpp.llnl.gov

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[Message index]

		Memory linits for Unix IDL By: John Varsik on Mon, 27 October 1997 00:00
		Re: Memory linits for Unix IDL By: alpha on Fri, 07 November 1997 00:00
		Re: Memory linits for Unix IDL By: Achim Hein on Fri, 07 November 1997 00:00
		Re: Memory linits for Unix IDL By: Bruce Macintosh on Thu, 06 November 1997 00:00

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