[R] Windows R 1.8.0 hangs when Mem Usage >1.8GB

[Liaw, Andy]

Sorry.  I need to retract my claim.  There seems to be a 3G limit, even
though the OS could handle nearly 8G.  (I can have two simultaneous R
processes each using near 3G.)

On another note, on our dual Opteron box R (compiled as 64-bit) could easily
use nearly all the 16G in that box (that's one of the reason for having that
box).

Cheers,
Andy

> From: Paul Gilbert [mailto:pgilbert at bank-banque-canada.ca] 
> 
> Liaw, Andy wrote:
> > With a custom compiled kernel, I've run R processes that 
> used more than 5GB
> > of RAM on a Linux box with 8GB RAM and dual Xeons.  So it 
> seems to work on
> > 32-bit Linux with big memory kernel.
> > 
> > Andy
> 
> I'm curious about this. I believe the address space limit of a 32-bit 
> processor is 4G, and I thought Xeons were 32-bit processors. 
> How can a 
> single process exceed the address space?
> 
> Thanks,
> Paul Gilbert
> > 
> > 
> > 
> >>From: Duncan Murdoch [mailto:dmurdoch at pair.com] 
> > 
> > [snip] 
> > 
> >>Normally the maximum memory allowed for any process in 
> >>Windows is 2 GB.  It's possible to raise that to 3 GB but R 
> >>1.8 doesn't know how, so that's an absolute upper limit.  
> >>Version 1.9 may be able to go up to 3 GB, but beyond that 
> >>you'll probably need a 64 bit processor:  as far as I know 
> >>all the 32 bit OS's limit each process to 2 or 3 GB, because 
> >>they reserve 1 or 2 GB for themselves.
> >>
> > 
> > [snip]
> >  
> > 
> >>Duncan Murdoch
> >>
> >>______________________________________________
> >>R-help at stat.math.ethz.ch mailing list 
> >>https://www.stat.math.ethz.ch/mailman/listinfo> /r-help
> >>
> > 
> > 
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> > 
> 
>