swapon -s

cp /etc/fstab /etc/fstab.bak
# For 4 CPU Core create 4 swap files:
for i in $(seq 0 3); do
    fallocate -l 1G /swapfile$i;
    mkswap /swapfile$i;
    swapon /swapfile$i -p 10
    echo "/swapfile$i none swap sw 0 0" >> /etc/fstab;
done
swapon -s

cp /etc/sysctl.conf /etc/sysctl.conf.bak
echo 'vm.swappiness=10' >> /etc/sysctl.conf
echo 'vm.vfs_cache_pressure=50' >> /etc/sysctl.conf
sysctl -p