[R] Absolute ceiling on R's memory usage = 4 gigabytes?
andy_liaw at merck.com
Fri Jul 2 00:07:13 CEST 2004
Did you compile R as 64-bit executable on the Irix? If not, R will be
subjected to the 4GB limit of 32-bit systems.
Search the archive for `Opteron' and you'll see that the limit is not 4GB,
for 64-bit executables.
> From: Kort, Eric
> Hello. By way of background, I am running out of memory when
> attempting to normalize the data from 160 affymetrix
> microarrays using justRMA (from the affy package). This is
> despite making 6 gigabytes of swap space available on our sgi
> irix machine (which has 2 gigabytes of ram). I have seen in
> various discussions statements such as "you will need at
> least 6 gigabytes of memory to normalize that many chips",
> but my question is this:
> I cannot set the memory limits of R (1.9.1) higher than 4
> gigabytes as attempting to do so results in this message:
> WARNING: --max-vsize=4098M=4098`M': too large and ignored
> I experience this both on my windows box (on which I cannot
> allocate more than 4 gigabytes of swap space anyway), and on
> an the above mentioned sgi irix machine (on which I can). In
> view of that, I do not see what good it does to make > 4
> gigabytes of ram+swap space available. Does this mean 4
> gigabytes is the absolute upper limit of R's memory
> usage...or perhaps 8 gigabytes since you can set both the
> stack and the heap size to 4 gigabytes?
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