Swapping serves a purpose, but your machine already has more than you need. Your bottleneck is that you haven't enough ram for the tasks you want to do. You are swapping to disk a lot, and as I told you, the disk is, in the best case, many million times slower than ram. Swap can be good for some things, but it's not a substitute for true ram.
Sorted that, you can forget about that fdisk thing now. As said, you either need lighter applications or more ram if you want a more responsive system. Ubuntu and SuSE are anything but light on their default setups.