I am also facing this problem of Out of memory in my systems. I am working on Apple ProRess 422 HD (1920 x 1080i). I am working on SAN 96 TB, Mac Pro 2 X 2.26 Quad Core with 8 GB RAM, AJA Kona LHi capture card.
The problem that we are facing frequently is FCP quits unexpectedly and also many times the message “out of memory” pops up.
We then need to restart the system then it works for 5 to 10 minutes then again same problem, some times it works OK for an hour or so.
Please suggest.