[R] Memory management

[Peter Dalgaard BSA]

Konstantinos Euripides Vorloou <K.E.Vorloou at durham.ac.uk> writes:

> rgui --vsize 30M --nsize 1000K
> rgui --vsize 30M --nsize 2000K
> rgui --vsize 30M --nsize 3000K
> rgui --vsize 30M --nsize 4000K
> 
> I try to open a matrix 8000x8000 by issuing
> 
> x<-matrix(nrow=8000,ncol=8000)
> 
> I  always get the following message:
> 
> Error: heap memory (20480  Kb) exhausted [needed 250000 Kb more]

it's --vsize that controls the heap...

> It's always 250000 Kb less. Although gc() reports the memory management
> as
> expected (correctly ?), increased every time I invoke R with greater
> vsize,nsize
> params. My matrix should hold roughly 1 Meg of memory.
> Is this correct ?

I get 8000*8000*8 = 512000000 bytes, alias 488Meg...



-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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