As you can see from the attached screen shot, my Macbook Pro (2015) with OSX 10.12 is using 3GB SWAP when only 9GB RAM out of 16GB is being used. This is causing my system to become pretty much unusable. The SWAP memory is too slow and the system becomes unresponsive. Is this common behavior? Any particular reason on why this is happening or ideas on how I can resolve it?