[R-SIG-Mac] Problems with big objects in R-2.5 x86_64

[Simon Urbanek]

Eric,

unless you tell us more precisely what you do and what machine you  
have we can't really help you. If you don't have enough RAM (>4GB) 64- 
bit R won't really help you as it ends up swapping all the time  
anyway (just look at the resource usage).

Cheers,
Simon


On May 23, 2007, at 11:15 AM, Eric Blanc wrote:

> Hi,
>
> I encountered problems in using the experimental build R 2.5 for
> x86_64 architecture. I have downloaded the framework from
>
> http://r.research.att.com/R-25-br-quad.tar.gz
>
> I tried to load large objects, (about 2GB each), but it hangs at
> random points, apparently always after the 4GB mark (i.e. while
> loading the 3rd object). I am monitoring the resources usage from
> another terminal window (top), and the R process never completes
> loading the 3rd object, the memory usage stops increasing before
> reaching 6GB, even though the CPU usage by R is 100%. The time
> required to load the 1st and 2nd objects are about 1 minute each,
> while I stopped R after 30 minutes (without completing loading the
> 3rd object). I had similar problems last december, when I tried to
> compile R 2.4 from scratch using the instructions in
>
> https://stat.ethz.ch/pipermail/r-sig-mac/2006-November/003384.html
>
> Here is the sessionInfo():
>
> R version 2.5.0 Patched (2007-05-02 r41420)
> x86_64-apple-darwin8.9.1
>
> locale:
> C
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices" "utils"     "datasets"
> "methods"
> [7] "base"
>
> Has anybody tried to use large amounts of memory with R 2.5 x86_64 ?
> I must add that I tried to load the same objects, on the same
> machine, but using Ubuntu 7.4 x86_64, and it works on Ubuntu. It
> seems to be a OS X problem (I am using 10.4.9).
>
> Thanks,
> Eric
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