This computer keeps swapping like crazy, 5 GB of page-outs in a single session. All I have open is Safari, Mail, Skype, Aperture, and iTunes. Currently always using up 100% of the 8 GB, split between Aperture (1.5 GB), Safari Web Content (~1.1 GB), kernel_task (~800 MB), Safari (~650 MB), Mail (~500 MB), WindowServer (~400 MB), Skype (~350 MB), iTunes (~120 MB), and some extra Wired and Inactive memory. What am I doing wrong? Is 8 GB really insufficient for this machine?