RAM optimization in macbook pro

hi there,
i have a 2.8 uni mbp that i just upgraded with 6g of ram. however, my system doesn't seem to use all of it. using activity monitor, i see that my system has 3.93g free. i know that my system is capable of utilizing the ram because when i stressed the system, all 6g are capable of being used. it seems like a waste to have all that ram being free. is there something i can do to have my system use ram more?

it depends on what you are doing. OS X isn't going to use 6gb at idle or surf the web, it doesn't need it. unlike vista that can use 2Gb just to run the OS, Apple apps & the Unix based kernerl use what they need.
Video editing, rendering, Photoshop, etc will use up RAM, that's really the only reason to use that much memory.
Unless you plan on doing some heavy work, 6Gb just for OS X & surfing the web simply isn't needed nor going to be used - yet!
that may change in the future, who knows.

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