Create swap files

> dd if=/dev/zero of=/tmp/swap_file bs=512k count=4000

> mkswap /tmp/swap_file

> swapon /tmp/swap_file

Add the following item to fstab for auto mounting

/tmp/swap swap swap defaults 0 0

Modify Swapness

• for once

sudo sysctl vm.swappiness=10

• for permanently

sudo vim /etc/sysctl.conf

+ vm.swappiness=10