Thanks Uwe,
What is the theoretical limit for 32 bit Windows anyway? BTW, --max-mem-size=2000M works (although maybe not all usable?)
I don't know the usable amount exactly, one has to look into Microsoft's docs. It must be a bit smaller than 2GB (differently from the problem of ~3.7GB usable out of 4GB, because of other address spaces).
I've just looked into the sources: R calculates with integers and of course (too stupid I had not realized it at once) has the same 32bit limit! So try 2047M (last "working" one) and 2049M which becomes negative.
memory.limit()
[1] 2097152000
In R-1.7.1, --max-mem-size=2G *did* work (I get the same results as above).
In R-1.7.1 (2003-06-16) on WinNT4.0 it did *not*.
Uwe
Jim
James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623
Uwe Ligges <[EMAIL PROTECTED]> 10/07/03 12:28PM >>>
James MacDonald wrote:
Using R-1.8.0 (d/l and compiled on 2003-10-01) on WinXP, I seem to
be
unable to determine the maximum memory allocated to R. The help
still
says to use memory.limit(size=NA), but this returns the value NA.
In addition, I have set --max-mem-size=2G but I run out of memory somewhere around 500Mb (which is why I am trying to find out how
much
memory is allocated). I don't have any other programs open, so I
should
certainly be able to address more memory than that.
Any ideas?
Yes. 2GB is a bit more than the possible theoretical maximal value for
a single process on 32-bit Windows. Instead, try starting with, e.g., "--max-mem-size=1700M" and you'll get
> memory.limit() [1] 1782579200
Uwe Ligges
TIA
Jim
James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623
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