memory.size reports the current or maximum memory allocation of
the malloc function used in this version of R.
memory.limit reports or increases the limit in force
on the total allocation.
memory.size(max = FALSE)memory.limit(size = NA)
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.
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’.
Size in Mb (1048576 bytes), rounded to 0.01 Mb for memory.size
and rounded down for memory.limit.
Command-line flag --max-mem-size sets the maximum value of obtainable memory (including a very small amount of housekeeping overhead). This cannot exceed 3Gb on 32-bit Windows, and most versions are limited to 2Gb. The minimum is currently 32Mb.
If 32-bit R is run on most 64-bit versions of Windows the maximum value of obtainable memory is just under 4Gb. For a 64-bit versions of R under 64-bit Windows the limit is currently 8Tb.
Memory limits can only be increased.
Environment variable R_MAX_MEM_SIZE provides another way to
specify the initial limit.
Memory-limits for other limits.
The rw-FAQ for more details and references.
memory.size()
memory.size(TRUE)
memory.limit()
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