I’ve discovered that a 2nd instance of GP can have a different predictive loading setting than the first instance.
Run an instance that has predictive loading enabled and another w it disabled. In my case I have great sounding Waves PRS guitar amp emulator plug-ins that crash GP when used w predictive loading. So run it in a 2nd instance and the other 14gig of rackspaces in a predictive loading instance that reduces it to less than 4 gig.
Best of both worlds