[R] Trouble with the memory allocation

[Prof Brian D Ripley]

On Mon, 16 Jul 2001, Laurent Gautier wrote:

> Dear R-users,
>
>
> I am currently facing what appears to be a strange thing (at least to my
> humble understanding).
>
> If  I understood correctly, starting with the version 1.2.3, R memory
> allocation can be done dynamically,
> and there is no need to fiddle with the --nsize and --vsize parameter
> any longer...

starting with 1.2.0, yes.

>
> So far this everything seemed to go this way (I saw the size of my
> processes growing when I was using big objects and
> so on). Howver recently I had trouble with the memory. It seems there is
> a limit of about 1,2 Go, beyond which R starts
> to send memory allocation error messages...  not consistent with the
> memory still available
> (like 'Error: cannot allocate vector of size 125382 Kb', while there
> still about 17Go free).

Is this compiled as 32-bit or 64-bit process?  And are there any
per-process limits set?  A 32-bit process will (by definition) have a
4Gb limit, and may well have 2Gb or less depending how the malloc is
organised.

> I thought default limitation were set, but it does not seem to be the
> case
>
> > mem.limits()
> nsize vsize
>    NA    NA

That's correct.  See ?mem.limits.

>
> Any idea ?
>
> Where am I wrong ?
>
>
>
> Laurent
>
>
> PS: I am currently using R-1.3.0-patched, compiled on SGI IRIX 6.5 (I
> was using 1.2.3 and had the same kind of problems, that's why
> I upgraded)

No change in that area since 1.2.3.

>
>
>
> --
> Laurent Gautier                 CBS, Building 208, DTU
> PhD. Student                    D-2800 Lyngby,Denmark
> tel: +45 45 25 24 85            http://www.cbs.dtu.dk/laurent
>
>
>

-- 
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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