R help - Dec 2005 - R for Windows server

Hi,
  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. 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?
  Thank you in advance,
  Marco Geraci

			
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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 
hyperthreading.
> 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 
machines.

-- 
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

Hello,

You don't tell us much info (what processor(s) are exactly in your 
server?). You must know the following:

1) Windows server prioritizes client accesses over local running 
programs (but you say there is no other process slowing down R... is it 
deconnected from the network?),

2) Rgui uses only one processor (at least, if you did not customized the 
default installation). Take care that, for instance, with an Intel 
HyperThreading (HT) Pentium IV processor, the system is working as if it 
was a bi-processor config with a single processor... and the task 
manager will not report more than 50% of CPU use for RGui.exe. Thus, I 
can imagine that, if you have a bi-processor hyperthreading config, it 
could report only 25% of CPU use.
Best,

Philippe Grosjean

..............................................<??}))><........
  ) ) ) ) )
( ( ( ( (    Prof. Philippe Grosjean
  ) ) ) ) )
( ( ( ( (    Numerical Ecology of Aquatic Systems
  ) ) ) ) )   Mons-Hainaut University, Pentagone (3D08)
( ( ( ( (    Academie Universitaire Wallonie-Bruxelles
  ) ) ) ) )   8, av du Champ de Mars, 7000 Mons, Belgium
( ( ( ( (
  ) ) ) ) )   phone: + 32.65.37.34.97, fax: + 32.65.37.30.54
( ( ( ( (    email: Philippe.Grosjean at umh.ac.be
  ) ) ) ) )
( ( ( ( (    web:   http://www.umh.ac.be/~econum
  ) ) ) ) )          http://www.sciviews.org
( ( ( ( (
..............................................................

Marco Geraci wrote:
> Hi,
>   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. 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?
>   Thank you in advance,
>   Marco Geraci
> 
> 			
> ---------------------------------
> 
> 
> 	[[alternative HTML version deleted]]
> 
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