Attached Link: Stefan's Firefly FAQ

See #14 in the attached link. Firefly seems to be a real memory hog. I have a Pentium 2.8GHz with 1.5 Gb RAM, and I still have to be very careful when it comes to rendering with Firefly. Sometimes I use the P4 renderer, just because it's easier. Personally, I've found reducing the bucket size helps a lot. I've gone as low as 8. It takes a long time to render, but it does complete the render. (I let it run over night, or while I'm at work.) I also turn off texture filtering, unless it's needed. Usually, it isn't.