I've been monitoring my RAM usage lately and I really don't fully understand all the terms in Activity Monitor. I would love to understand more about what's going on with my RAM usage and Virtual RAM. Here's some questions: What is Wired RAM? What's the deal with Page in/Page outs? Why does each App have it's own Real Memory and Virtual Memory allocations? Why is my Virtual RAM so big? (5GB for example) How come Inactive RAM isn't the same as Free RAM? I hope there are people who can explain to me how I can check to see if the amount of memory I have is optimal for my work (and play) habits.