From: Uwe Ligges (ligges@statistik.uni-dortmund.de)
Date: Tue 13 Mar 2001 - 03:57:34 EST
Message-ID: <3AAD0E0E.FC60D834@statistik.uni-dortmund.de>
Bob Sandefur wrote:
>
> hi-
> If I source the following
>
> for(k in seq(1:20)){
> x<-runif(20000,min=-500,max=2000)
> y<-runif(20000,min=-500,max=2500)
> z<-runif(20000,min=-10,max=10)
> cat(k,"file",memory.size())
> cc<-rainbow(11)
> plot(x,y,asp=1i,xlim=c(-500,2000),ylim=c(-500,2500),main=k,cex=1.0)
> for(i in seq(-10,10,2)){
> points(x[z > i],y[z > i],col=cc[(12+i)/2],cex=1.0)
> }
> rm(x,y,z)
> cat(k,"fil2",memory.size(),"\n")
> #readline(prompt="enter for nextplot")
> dev.off()
> }
> ~
> the check print gets to 256MB and R fails; I think I am freeing everthing with the rm(...) and dev.off().
> Am I failing to free something or force r to do garbage collection?
Interesting. On NT4.0 R consumes about 20MB at all and does garbage
collection.
Output from you function:
1 file 94173681 fil2 14067880
2 file 145127522 fil2 14284016
3 file 120852243 fil2 13324928
...
20 file 1329924020 fil2 12662432
> I start r with
>
> P:\r\base\rw1022\bin\rgui.exe --vsize=300M --nsize=20000k
> and turn of buffered output
These options are not neccessary in R-1.2.2, have a look at ?Memory:
"For backwards compatibility, options --nsize and --vsize are equivalent
to --min-nsize and --min-vsize. "
So you told R to use a minimal vsize of 300M.
On the other hand "The default [of max-mem-size] is the smaller of the
amount of physical RAM in the machine and 256Mb".
This explains it all, I think.
Uwe Ligges
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