I would like to increase (or decrease) the amount of memory available to R. What are the methods for achieving this?
Windows users may get the error that R
has run out of memory.
If you have R already installed and
subsequently install more RAM, you may
have to reinstall R in order to take
advantage of the additional capacity.
You may also set the amount of
available memory manually. Close R,
then right-click on your R program
icon (the icon on your desktop or in
your programs directory). Select
“Properties”, and then select the
“Shortcut” tab. Look for the
“Target” field and after the closing
quotes around the location of the R
as shown in the figure below. You may
increase this value up to 2GB or the
maximum amount of physical RAM you
If you get the error that R cannot
allocate a vector of length x, close
out of R and add the following line to
the “Target” field:
or as appropriate. You can always
check to see how much memory R has
available by typing at the R prompt
which gives you the amount of available memory in MB. In previous versions of R you needed to use:
memory.limit(). You can increase the default using this command,
memory.limit(size=2500), where the size is in MB. You need to be using 64-bit in order to take real advantage of this.
One other suggestion is to use memory efficient objects wherever possible: for instance, use a matrix instead of a data.frame.
For linux/unix, I can suggest unix package.
To increase the memory limit in linux:
install.packages("unix") library(unix) rlimit_as(1e12) #increases to ~12GB
You can also check the memory with this:
for detailed information:
also you can find further info here:
limiting memory usage in R under linux