@Nick Batzdorf said:
I've managed to load about 7GB on a 2 x 2.5 G5 and have it work fine. (Using the old "stand-alone outside DAW and plug-in inside DAW" trick.)...
I'm still trying to figure out some of the rhyme and reason behind what works and doesn't work. The next step is to see whether running stand-alone instances outside Logic would work better.
What's interesting is that the offline bounce of the cue was fine.
This is still a mystery to me. As I watch Activity Monitor, it seems that Virtual Memory is accessing all available RAM no matter if the instances are inside or outside of DP. I'm not sure which works better because the amount of data on deck to page to/from VM always exceeds the amount of RAM I have.
What's really odd is that at one time VM used to kick in with a lot more available than it seems to do now. More often the latest readings appear to be tapping in to a lot more available RAM as VM data increases. I no longer see the 3-4GB brick wall.
The more I learn the less I understand.