On Fri, 5 May 2006, Robert Citek wrote:
>
> On May 5, 2006, at 11:30 AM, Thomas Lumley wrote:
>> In addition to Uwe's message it is worth pointing out that gc()
>> reports
>> the maximum memory that your program has used (the rightmost two
>> columns).
>> You will probably see that this is large.
>
> Reloading the 10 MM dataset:
>
> R > foo <- read.delim("dataset.010MM.txt")
>
> R > object.size(foo)
> [1] 440000376
>
> R > gc()
> used (Mb) gc trigger (Mb) max used (Mb)
> Ncells 10183941 272.0 15023450 401.2 10194267 272.3
> Vcells 20073146 153.2 53554505 408.6 50086180 382.2
>
> Combined, Ncells or Vcells appear to take up about 700 MB of RAM,
> which is about 25% of the 3 GB available under Linux on 32-bit
> architecture. Also, removing foo seemed to free up "used" memory,
> but didn't change the "max used":
No, that's what "max" means. You need gc(reset=TRUE) to reset the max.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
[EMAIL PROTECTED] University of Washington, Seattle
______________________________________________
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
