[R] accessing virtual memory

Prof Brian D Ripley ripley at stats.ox.ac.uk
Sat Sep 1 08:40:39 CEST 2001

On Fri, 31 Aug 2001, Michael Roberts wrote:

> Hello R users,
> I am doing some work with a large data set but am running out
> of memory.  I understand that R dynamically loads memory as
> it needs it, but for some reason it cannot seem to find my virtual
> memory.  It's limit is about 256M (my hard memory) regardless
> of the amount of virtual memory. I'm running R 1.30 on Windows
> NT.
> Am I missing an easy fix here?

See the rw-FAQ, question

  2.4 There seems to be a limit on the memory it uses!

Also, you will get a message when it runs out saying

Reached total allocation of 255Mb: see help(memory.size)

and you could always as a last resort do as it says ....

I should say that on Windows 9x systems you really don't want to use your
virtual memory, and for NT/2000 you will see a large performance hit.

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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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