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I know it's easily possible to increase the memory limit of R using the command memory.limit(size=N). If I try to decrease it to a value smaller than N, for obvious reasons I get the error:
Warning message:
In memory.limit(size = 10) : cannot decrease memory limit: ignored
Is there a way to decrease the memory limit upfront running code (or as first command)? I want to implement this for training purposes (how to deal with memory issues?).
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Go to Tools -> Memory and uncheck Show Current Memory Usage.
Use memory. limit() . You can increase the default using this command, memory. limit(size=2500) , where the size is in MB.
Under most 64-bit versions of Windows the limit for a 32-bit build of R is 4Gb: for the oldest ones it is 2Gb. The limit for a 64-bit build of R (imposed by the OS) is 8Tb.
Determining Your Memory Limits in R RAM is capped at ~3.5GB in x32 Windows systems, and at the RAM installed in x64 Windows (W7/W8/W10) / MAC OS / Linux-build CPUs. Two calls, memory. limit() and memory. size() return the amount of RAM in your CPU, and how much is being used by your current R session, respectively.
From the fact that you are using memory.limit I assume that you are under Windows. If not, see ?'Memory-limits'.
You can start R (from the command line) with the --max-mem-size switch. For example,
R --max-mem-size=50000000
gives a limit of approximately 50MB.
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