vps swap creation put simple

vps_swap_activation

# tested on ubuntu 14.04

# ------------------------------------------
# CREATE SWAP:
# ------------------------------------------

$ swapon -s
$ free -m
$ sudo fallocate -l 4G /swapfile
$ ls -lh /swapfile

# ------------------------------------------
# ENABLE SWAP:
# ------------------------------------------

$ chmod 600 /swapfile
$ ls -lh /swapfile
$ sudo mkswap /swapfile
$ sudo swapon /swapfile
$ sudo swapon -s
$ free -m

# ------------------------------------------
# PERMA SWAP:
# ------------------------------------------

$ sudo nano /etc/fstab
# add to last line:
# /swapfile   none    swap    sw    0   0

# ------------------------------------------
# TWEAKS:
# ------------------------------------------

$ sudo sysctl vm.swappiness=10
$ sudo nano /etc/sysctl.conf
# add to last line:
# vm.swappiness=10
$ sudo sysctl vm.vfs_cache_pressure=50
$ sudo nano /etc/sysctl.conf
# add to last line:
# vm.vfs_cache_pressure = 50