| gc {base} | R Documentation |
A call of gc causes a garbage collection to take place.
gcinfo sets a flag so that
automatic collection is either silent (verbose=FALSE) or
prints memory use statistics (verbose=TRUE).
gc(verbose = getOption("verbose"))
gcinfo(verbose)
verbose |
logical; if TRUE, the garbage collection prints
statistics about cons cells [in Bytes] and the vector heap [in KBytes]. |
A call of gc causes a garbage collection to take place.
This takes place automagically without user intervention, and the
primary purpose of calling gc is for the report on memory usage.
gc returns a 2*3 matrix with rows "Ncells" (cons
cells, usually 20 bytes each on 32-bit systems, 36 bytes each on
64-bit systems) and "Vcells" (vector cells, 8 bytes each),
and columns "free", "total" and "(Mb)" (rounded up
to the next 0.1Mb).
gcinfo returns the previous value of the flag.
Memory on R's memory management and
gctorture if you are an R hacker.
gc() #- do it now gcinfo(TRUE) #-- in the future, show when R does it x <- integer(0); for(i in 1:18) x <- c(x,i,x) gcinfo(verbose = FALSE)#-- don't show it anymore ( rgc <- gc(TRUE) ) (100*rgc[,"free"])%/% rgc[,"total"] # the percentages rgc[2,"free"]/ (1024 / 8) # free vector heap in K bytes