Does R do its own swapping out to disk? I disabled Linux swapping and the system still gets stuck in Purgatory where there's little CPU activity but the disk goes like crazy. That's with R having almost the whole machine to itself and running a memory hungry compute only function. I've seen this behavior with other version numbers but I'm running R 2.0.0 under Fedora Core 3. The system is a laptop with 1 Gig. RAM. Thanks!
On Sat, 13 Nov 2004, Rob Steele wrote:> Does R do its own swapping out to disk? I disabled Linux swapping and theNo.> system still gets stuck in Purgatory where there's little CPU activity but > the disk goes like crazy. That's with R having almost the whole machine to > itself and running a memory hungry compute only function. > > I've seen this behavior with other version numbers but I'm running R 2.0.0 > under Fedora Core 3. The system is a laptop with 1 Gig. RAM.I don't see it on machines with 1 or 2Gb of RAM and 3-10Gb of swap. -- Brian D. Ripley, ripley at stats.ox.ac.uk 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
IMHO it's dependend on your data size and the functions you use. I'm getting same behaviour (suse9) when i use mysqlWriteTable and reshape with large datasets and a upgrade from 512MB to 1GB works much more better - but now i dream from 2GB-4GB. christian Rob Steele wrote:> Does R do its own swapping out to disk? I disabled Linux swapping and > the system still gets stuck in Purgatory where there's little CPU > activity but the disk goes like crazy. That's with R having almost > the whole machine to itself and running a memory hungry compute only > function. > > I've seen this behavior with other version numbers but I'm running R > 2.0.0 under Fedora Core 3. The system is a laptop with 1 Gig. RAM. > > Thanks! > > ______________________________________________ > R-help at 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 >