Use the Caps Lock key -- that way, the video won't update when you scrub.... and the scrubbing goes faster, too!
Thank you Dave,
But with Caps lock on I can't see the animation to sync with.
Also it's still eating up the RAM, it's roughly 200MB per 8 seconds, every time I scrub.
Wait -- when you're scrubbing audio, you're just getting the timing down. Who needs images? Use a marker on a layer. Then remove the Caps Lock and animate to those markers. Done.
But truth be know, you have other issues going on that NOBODY can address in a helpful manner without additional information:
I'm scrubbing to link up fine points in the animation and lip syncing for an animated character.
I just thought there would be an easy way to clear all the files from the RAM that After Effects holds in there without having to restart the program to do it. The purge feature seems to only get rid of the visual renders, but in my case it is Audio that looks like it is still hogging.
I'll hunt down the answers to the questions in that FAQ.
If you think it's the audio that's the problem, here's a tip: don't use compressed audio in AE.... that's stuff like mp3's or ac3's. Convert them to wav's or aiff's for use in AE.