| Re: Max memory on IRIX? [message #20004] |
Fri, 12 May 2000 00:00 |
Patrick Broos
Messages: 27
Registered: December 1996
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Junior Member |
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Dave,
<BR>Just a thought ... The cshell in Solaris imposes various limits on
the resources that child processes can
<BR>use, including the data size. In my shell the command "limit"
will show the current settings.
<P>Regards,
<BR>Patrick Broos
<BR>
<P>Dave Wyble wrote:
<BR>
<BLOCKQUOTE TYPE=CITE>We're having some memory difficulties. The problem
is that we cannot
<BR>seem to get IDL to use any more than about 1.2GB of RAM. We have tons
of
<BR>swap space allocated, and have verified that it is used correctly.
No
<BR>matter what we do, IDL seems to have a maximum amount of memory it
will
<BR>give us, and then no more is to be had.
<P>The procedure is to simply allocate storage:
<BR>z1 = fltarr(1000,1000,20)
<BR>z2 = ...
<BR>until the out of memory error occurs. We monitor system memory and
swap
<BR>space used. There is nothing else running on the machine, and since
we
<BR>don't approach the 8GB limit of physical memory, swap space doesn't
seem
<BR>to come into play.
<P>The system specifics are:
<BR>SGI Onyx2
<BR>8 CPUs
<BR>8 GB memory
<BR>IDL 5.2 or 5.3 (identical results)
<P>Any ideas out there?
<P>Thanks in advance for your help.
<P>Dave Wyble
<BR>Munsell Color Science Laboratory
<BR>RIT</BLOCKQUOTE>
<PRE>--
============================================================ ========
Patrick S. Broos, Systems Analyst/Programmer patb@astro.psu.edu
Department of Astronomy and Astrophysics My office 814-863-5505
Penn State University
525 Davey Lab &nb sp; &nb sp; &nb sp; &nb sp; FAX &nb sp; 814-863-8686
University Park, PA 16802-6305
<A HREF="http://www.astro.psu.edu">http://www.astro.psu.edu</A> Group office 863-9550
============================================================ ======== </PRE>
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| Re: Max memory on IRIX? [message #20009 is a reply to message #20004] |
Fri, 12 May 2000 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Dave Wyble (wyble@cis.rit.edu) writes:
> We're having some memory difficulties. The problem is that we cannot
> seem to get IDL to use any more than about 1.2GB of RAM. We have tons of
> swap space allocated, and have verified that it is used correctly. No
> matter what we do, IDL seems to have a maximum amount of memory it will
> give us, and then no more is to be had.
>
> The procedure is to simply allocate storage:
> z1 = fltarr(1000,1000,20)
> z2 = ...
> until the out of memory error occurs. We monitor system memory and swap
> space used. There is nothing else running on the machine, and since we
> don't approach the 8GB limit of physical memory, swap space doesn't seem
> to come into play.
>
> The system specifics are:
> SGI Onyx2
> 8 CPUs
> 8 GB memory
> IDL 5.2 or 5.3 (identical results)
>
> Any ideas out there?
I don't know any of the details, but I do know IDL 5.4
is meant to address the problem of working with large
data sets. This may well be one of the problems they are
working on. I'd check with RSI.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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