[R] Memory/data -last time I promise

Martin Maechler maechler at stat.math.ethz.ch
Wed Jul 25 12:26:02 CEST 2001

>>>>> "Agustin" == Agustin Lobo <alobo at ija.csic.es> writes:

    Agustin> On Tue, 24 Jul 2001, Prof Brian Ripley wrote:

    BDR> The main problem I see is that your machine seems unable to
    BDR> allocate more than about 450Mb to R, and it has surprisingly
    BDR> little swap space.  (This 512Mb Linux machine has 1Gb of swap
    BDR> allocated, and happily allocates 800Mb to R when needed.)

    Agustin> Well, this rises an interesting point for me: are there
    Agustin> advices on how to configure a particular system for best R
    Agustin> performance with large datasets? I've looked into the R system
    Agustin> guide and could not find anything (that document is a bit
    Agustin> obscure for me, must recognize).

which document?  There's no  ``R system guide''

    Agustin> Do you get the 800 Mb by starting R with a particular option?

no; Brian said ``when needed'' which means that R allocates memory (almost
always) when it needs it.

    Agustin> (BTW, I do not remember how much swap I defined for my linux
    Agustin> system, how could I check that?. Excuses for the not-R question)
cat /proc/meminfo

Martin Maechler <maechler at stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO D10	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><
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