Re: S-Plus Memory

["statman" <statman1957@hotmail.com>]

IIRC, this is a 'feature' of WinXP 32 bit. That is, you cannot have more than 2 gigs available for your process. Check out the R archives for the reasons etc. When I did my Chemistry Degree (a billion years ago - well not really, but a while), my Physical Chemistry textbook (Moore) had an alternative version of the 3 laws of thermodynamics which went (if my memory didn't):

 

You can't win, you can only break even.

You can only break even at absolute zero.

You can't reach absolute zero.

 

Go figure.......................... 8¬)

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From: s-news-owner@lists.biostat.wustl.edu [mailto:s-news-owner@lists.biostat.wustl.edu] On Behalf Of Andreas Johansson
Sent: 09 January 2007 18:01
To: s-news@lists.biostat.wustl.edu
Subject: [S] S-Plus Memory

Have been playing around with S-Plus memory in S-Plus 8 (on 32-bit XP). Have noticed a few problems especially when using the Workbench.

1. Have 4GB of RAM with the /3GB switch (in boot.ini) enabling me to allocate 3GB to a single process. Still I can never manage to allocate more than 2GB to S-Plus. Even though some background processes takes up some memory I have about 2.7GB out of those 3GB available for sure, have also turned paging off (should not matter here).
2. Using the workbench I cannot allocate more than 1GB for same setup. Have also tried setting options("memory") to higher values but changes nothing.

Does anyone know of why S-Plus cannot grab all available RAM? 

Is anyone using the 64-bit version on a Linux platform with more than 4GB of RAM and would like to share some performance stats?

 

Andreas  

 

Andreas Johansson

Quantitative Analyst

 

MBAM
4th Floor, 11 Old Jewry
London EC2R 8DU

Andreas.Johansson@mbamfunds.com

Tel. (+44)20 7071 3351

Fax. (+44)20 7509 7454

 

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