Michael Styer wrote:
I did some more research and I think I've answered my own question.

So my next question is, does anyone have any thoughts about how significant a project it would be to compile R for 64-bit windows (using, e.g., the Portland Group compiler)?

How much of the code would need to be changed to get around the issue with longs?

I think this is probably beyond the scope of my project but I should make sure before I give up.

It isn't the path of least resistance. If you want 64 bit processing for a specific task, it is much easier to set up a machine with one of the 64 bit Linux variants. Several of these even have precompiled R packages (as in .rpm/.deb/..., not as in CRAN).

That said, there is at least one commercial company who intends to get the Win64 issues sorted for at least one commercial compiler, and I understand that they will submit patches back to the R source tree. Presumably, this will allow the adventurous user to get the same toolchain and compile his own version, but in a cool-headed cost-benefit analysis, the commercial option might still have an edge. (The company should write their own advertising, but I think this pretty well illustrates the current balance of things.)


Thanks for your help!

Mike

Michael Styer wrote:
Hello,

I'm working with a very large dataset in R on a computer running 64-bit Windows Server 2008 Standard with 32GB of RAM. According to the R for Windows FAQ, the maximum value allowed for max-mem-size is 4095MB. Is it possible to run R with a higher memory limit on this system? I've tried changing memory.limit() in the R console but it claims the system has a 4-GB address limit, which I don't believe to be the case here.

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