Dear All, I'm linking R from another application and embedding it as described in the R-exts manual, i.e. with initialization done via Rf_initEmbeddedR. While everything works the same as in standalone R for Linux, under Windows I found a difference in the default memory.limit, which is fixed to 2GB (both win32 and win64) - compared to a limit in standalone R of 3.5GB for win32 and 16GB on win64 (which is the amount of physical memory I have).
So I wonder if this is just undocumented (at least, I couldn't find any mention of it) or unintentional. All I could find is the following: - man page of memory.limit doesn't mention a default 2GB limit, especially not on win64; - man page of memory.limit and rw-FAQ Q2.9 say that you can set the limit via --max-mem-size or R_MAX_MEM_SIZE env var: both work only in standalone R (Rf_initEmbeddedR ignores them); - R\src\gnuwin32\system.c defines R_size_t R_max_memory = INT_MAX; which is the reason of the 2GB default limit on embedded R; however INT_MAX is not the maximum integer value of an R_size_t variable either on win32 nor on win64; - line 879 of the same system.c source says: "/* set defaults for R_max_memory. This is set here so that embedded applications get no limit */" (meaning that that code is executed only for standalone R) which suggests that, at some point, the intention for embedded R was to impose no limit by default and maybe the INT_MAX value is a mistake. Thank you in advance, Livio [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel