Increasing or decreasing the memory available to R processes

Question

I would like to increase  or decrease  the amount of memory available to R   What are the methods for achieving this

User · Accepted Answer

From    http   gking harvard edu zelig docs How do I2 html  mirror      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   executible  add       --max-mem-size 500M      as shown in the figure below  You may   increase this value up to 2GB or the   maximum amount of physical RAM you   have installed        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        --max-vsize 500M      or as appropriate   You can always   check to see how much memory R has   available by typing at the R prompt    memory limit     which gives you the amount of available memory in MB   In previous versions of R you needed to use  round memory limit   2 20  2

User · Answer

In RStudio  to increase  file edit file path  quot   quot    quot  Rprofile quot     then in  Rprofile type this and save invisible utils  memory limit size   60000    To decrease  open  Rprofile invisible utils  memory limit size   30000    save and restart RStudio

User · Answer

To increase the amount of memory allocated to R you can use memory limit  memory limit size          Or  memory size max          About the arguments   size - numeric  If NA report the memory limit  otherwise request a new limit  in Mb  Only values of up to 4095 are allowed on 32-bit R builds  but see    Details     max - logical  If TRUE the maximum amount of memory obtained from the OS is reported  if FALSE the amount currently in use  if NA the memory limit

User · Answer

Buy more ram Switch to a 64-bit OS  Combine with point 1

User · Answer

For linux unix  I can suggest unix package  To increase the memory limit in linux  install packages  quot unix quot    library unix  rlimit as 1e12    increases to  12GB  You can also check the memory with this  rlimit all    for detailed information  https   rdrr io cran unix man rlimit html also you can find further info here  limiting memory usage in R under linux

User · Answer

Microsoft Windows accepts any memory request from processes if it could be done   There is no limit for the memory that can be provided to a process  except the Virtual Memory Size   Virtual Memory Size is 4GB in 32bit systems for any processes  no matter how many applications you are running  Any processes can allocate up to 4GB memory in 32bit systems   In practice  Windows automatically allocates some parts of allocated memory from RAM or page-file depending on processes requests and paging file mechanism   But another limit is the size of paging file  If you have a small paging-file  you cannot allocated large memories  You could increase the size of paging file according to Microsoft to have more memory space

User · Answer

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

[r] Increasing (or decreasing) the memory available to R processes

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