From Prof Brian Ripley <ripley@stats.ox.ac.uk>  Mon Apr 12 10:09:29 1999
From: Prof Brian Ripley <ripley@stats.ox.ac.uk> (Prof Brian Ripley)
Date: Mon, 12 Apr 1999 10:09:29 +0100 (BST)
Subject: --nsize and --vsize
Message-ID: <199904120909.KAA28372@toucan.stats.ox.ac.uk>

Martin M has suggested I widen this discussion to R-devel, and 

> I agree that we should increase them,
> but I'm not sure at all about the amount.
> 
> The default could even depend on the architecture (via "./configure")..

Views, please.

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Is is not time we increased the defaults a bit? As the base gets bigger
I hit 200k cons cells rather frequently. And 2Mb of heap seems low
compared to 3Mb of cons cells and 1.8Mb for the R binary.

How little memory do people have these data?  Except possibly on Windows
and old teaching labs I would have thought using 15Mb default for R
was very reasonable, which is about

--vsize 6Mb --nsize 300k

On Solaris that gives:

  PID USERNAME THR PRI NICE  SIZE   RES STATE   TIME    CPU COMMAND
 9308 ripley     1 -25    0   15M 8360K sleep   0:02  4.35% R.binary

as against the default

  PID USERNAME THR PRI NICE  SIZE   RES STATE   TIME    CPU COMMAND
 9309 ripley     1 -25    0 9664K 6416K sleep   0:02  4.66% R.binary

and that extra user memory makes a lot of difference.


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-- 
Brian D. Ripley,                  ripley@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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--nsize and --vsize
Prof Brian Ripley