Did you ever notice that your linux can swap if you are running #SAPHANA on it even though there is enough phys. memory for it?
If your are using sapconf/saptuned you are safe because vm.swapiness will be set to 25(%) => default: 60%.
(link: https://launchpad.support.sap.com/#/notes/0002779331)
Thx to Jens for this info