[R] R for Windows server

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Dec 14 15:49:55 CET 2005

Is hyperthreading on?  In that case the maximum is 50% ....
Are there two processors?  In that case the maximum is 25% ....

On Wed, 14 Dec 2005, Marco Geraci wrote:

>  I need to run a burdensome simulation. I'm using a Dell PowerEdge 2850, 
> 3.8 Ghz CPU, 2 Gb RAM, Windows server 2003, 32 bit. The task manager 
> indicates that Rgui.exe is using 25% of the CPU speed.

Don't believe the task manager, especially on a machine with 

> There is no other 
> process that is slowing down R.

>  Does anyone know if it's a limitation of R? If so, can I set up the 
> program for the CPU usage like I do for the memory usage? Is there a 
> version of R for servers?

No, R runs at close to 100% of possible on properly configured Windows 

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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