No answer but I can see you don't have enough RAM. That's one issue you need to fix.
yes, I solved the ram problem stoping SQL server and other services and now I'm using only 5Gb. I added two addiontal page files but I'm still having the same problem.
Have you contacted Amazon for assistance? Although, experience with software/hardware companies tells me they'll likely not accept any blame and state, "It's a software problem, contact Tableau Software"