Hi, I recently updated to 8GB of RAM. I have noticed a really annoying phenomenon with my 2010 13" MBP - After extensively using my computer with memory intensive programs (virtual machines, compiling code in X-code, lots of apps open, etc) and then quitting them (only have Chrome, finder, and Activity Monitor open) I now am only seeing 4.35gb of RAM free (out of 8). Activity Monitor is telling me I have the following: 935mb wired 1.06 active 1.68 inactive 3.72 used It seems that something is not releasing memory correctly? If I restart my computer the free RAM goes up significantly. Is there a good way to understand this? I've read through a lot of stuff on this but cannot really understand how things are working. But it seems my computer is utilizing RAM no more effectively with 8GB than 4GB because the percentage of "free to used" seems identical before and after installing the new RAM. Any thoughts would be greatly appreciated. Thanks!