We actually need to figure out why. Have you seen this with mar-11 or just with debug build? Did it actually use all available memory before crashing like error indicates?
Note that it worked fast on the first run before it ran out of memory. And second time it was very slow, was Windows still freeing memory when it happened? I also see you didn’t add second farm, you added even more of them. Is there a chance you had one of the disks doing heavy I/O due to 100% active time at some disks - Windows Mar 8 and Mar 11 release? I noticed it can consume significant amount of memory as well before it completes.