See ?gc ?"Memory-limits"
On Wed, 8 Aug 2007, Jun Ding wrote: > Hi All, > > I have two questions in terms of the memory usage in R > (sorry if the questions are naive, I am not familiar > with this at all). > > 1) I am running R in a linux cluster. By reading the R > helps, it seems there are no default upper limits for > vsize or nsize. Is this right? Is there an upper limit > for whole memory usage? How can I know the default in > my specific linux environment? And can I increase the > default? See ?"Memory-limits", but that is principally a Linux question. > > 2) I use R to read in several big files (~200Mb each), > and then I run: > > gc() > > I get: > > used (Mb) gc trigger (Mb) max used > Ncells 23083130 616.4 51411332 1372.9 51411332 > Vcells 106644603 813.7 240815267 1837.3 227550003 > > (Mb) > 1372.9 > 1736.1 > > What do columns of "used", "gc trigger" and "max used" > mean? It seems to me I have used 616Mb of Ncells and > 813.7Mb of Vcells. Comparing with the numbers of "max > used", I still should have enough memory. But when I > try > > object.size(area.results) ## area.results is a big > data.frame > > I get an error message: > > Error: cannot allocate vector of size 32768 Kb > > Why is that? Looks like I am running out of memory. Is > there a way to solve this problem? > > Thank you very much! > > Jun -- Brian D. Ripley, [EMAIL PROTECTED] 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 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.
