[Ubuntu] swap on off : remove swap and change swappiness

• change swappiness (ubuntu 16.04)
$ cat /proc/sys/vm/swappiness
$ sudo sysctl vm.swappiness=10
$ cat /proc/sys/vm/swappiness
$ sudo vi /etc/sysctl.d/99-sysctl.conf
vm.swappiness=10


• remove swap
$ free ==> check Mem free > Swap used
$ sudo swapoff -a && sudo swapon -a

https://help.ubuntu.com/community/SwapFaq