I encountered the same problem as @bloodmage and did a little more investigating.
Setting RealTimeLog=1 also fixed the process for me. I've attached my logs folder for both the crashed and successful runs.
Although the stalled process was using a lot of memory, I'm not convinced this is memory related. My total system memory usage never rose above 70%. This system has integrated graphics and 32GB of system memory.
Markarth Crash Report.zip