memory use problem.
On 10/09/2012 16:13, chrisk wrote:
I having issues with my memory size in R for Windows. I have implemented the 3gb switch for Windows 7 32 bit with 8gb of memory, only 4gb is available for use due to 32 bit limitations. 512Mb is taken by the shared video card, the memory limit is 2559mb yet I cannot use more than 1.5 gb of memory. I have searched eveywhere and cannot find any resolution to my issue.
?'Memory-limits' told you why
It is not normally possible to allocate as much as 2Gb to a single
vector in a 32-bit build of R even on 64-bit Windows because of
preallocations by Windows in the middle of the address space.
'Search eveywhere' seems not to have included the R help ... I agree
that Microsoft is very coy about what it does to your address space.
memory.limit()
[1] 2559
memory.size()
[1] 399.47
a = aov(data$cv~(data$Lo+data$La+data$Mo+data$Co))
Error: cannot allocate vector of size 1.4 Gb
gc()
used (Mb) gc trigger (Mb) max used (Mb) Ncells 726003 19.4 2251281 60.2 1677683 44.8 Vcells 37249684 284.2 93398451 712.6 93388743 712.5
(1024 * 14) + 44.8 + 712.5
[1] 15093.3
Thank you, Chris
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