[R] RAM usage
ripley at stats.ox.ac.uk
Tue Oct 22 11:29:10 CEST 2002
On Tue, 22 Oct 2002, Vaidotas Zemlys wrote:
> Brian D. Ripley wrote:
> >> I did not tell my problem, because I thought that it was more or less
> >> irrelevant to the memory usage problems I was experiencing. My intention
> >> was to ask about how R manages memory and is there something special >about
> >> that management everyone should know, but I don't know. I'm sorry if my
> >> letter was a bit unclear, English is not my native language.
> > But you did claim `must be used'. That really is rarely the case, and
> > the skill in programming R (or S) is use memory within the resources
> > available.
> Yes I did write 'must be used', yet I did not want to claim anything.
> Really, I did not want to express so strictly. I should of used 'is used',
> or something else. As I said English is not my native language:)
> I tried to run the same calculations with initial matrix size of 7500 rows
> and 70 columns, on Linux machine as you suggested. Debian Woody, R version
> 1.5.1 with 256 MB RAM and 256 MB Swap, everything worked fine, not like on
> Windows 2000 Professional machine with 256 RAM. It seems that Win2k is
> really missing something with memory management, or R windows build is
> somewhat different from linux build?
It's Windows. We have on Windows to use a non-standard memory manager as
the native one is so slow. Both don't handle large memory blocks well.
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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