i dont think anything TOO complicated is going on. i have maybe 4 instances of turbulent noise applied to various layers, as well as that many roughen edges. i think TN would definitely give it something to chew on, especially 4 of them, but besides that, its just straight keys and a few simple expressions.
graphics card is a GTX 580 3gb. win7 x64 w/16gb.
iv read a few articles on AE memory usage and what not, and most say the newer versions do a good job on their own so dont worry about it. not to helpful. so my personal rule for MP settings is that if its a project that requires loading lots of footage, or high res images, set fewer threads, with more ram per.
i had it set to use 1gb of ram per render thread when this problem occured, and i think 4gb reserved for windows. iv yet to do a test with MP disabled… since i got the render to work eventually i was happy enough at that.
i know AE needs to get organized before it starts rendering, and most of the time renders start promptly enough. its only been occaisionally when it gets realy slow. it usualy seems to happen when i go from half res test renders, to full res (1920). though im starting to think its happening more frequently now and im starting to be afraid of having to do renders! it also seems to take a very long time for ram previews to start. im guessing it may be related to the same MP issue. i realy havent spent enough time trying to find work arounds because its not that huge a deal and it usualy works, eventually.
so far its nothing thats a deal breaker, so to speak… just annoyances that i gotta work around.