Adding swap to your KVM VPS after install

Once you've done this, we suggest limiting the use of SWAP as using a lot of SWAP affects the Disk I/O, we suggest using the maximum amount of RAM as possible.

Please click here to know how to limit the SWAP usage and maximize the use of RAM.

Step 1 : Creating the swap file

The following command creates a 512 MB swap file,

dd if=/dev/zero of=/swapfile1 bs=1024 count=524288

If you're running low on disk space or need a small swap file, create a 128 MB swap file with the following command,

dd if=/dev/zero of=/swapfile1 bs=1024 count=131072

or a 64 MB swap file with the following,

dd if=/dev/zero of=/swapfile1 bs=1024 count=65536

Step 2 : Now setup the swap space

mkswap /swapfile1

Step 3 : Setting up permissions for the swap file

chown root:root /swapfile1
chmod 0600 /swapfile1

Step 4 : Activating the swap file

swapon /swapfile1

Step 5 : Verify that the swap file is activated

free -m

Last modified: March 14 2017 15:28:03