It’s been a long time since I’ve played with Linux. So, I’m learning again. The old way was to create a swap file with dd and swapon. I came across a nice article today on the modern way to do it. (yes, I’m starting to feel old). Mostly, it’s the same, but a few new ways of tuning things.
In case you are interested, the echo lines are so I can see what I’m about to add when editing. After I move to the right place in the file, I paste again. It’s just my way. Also makes it easier to see what I did when I dump my history.
Here is my history on how to add a 250GB swap partition.
sudo fallocate -l 250M /swapfile
ls -l /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo swapon -s
free -m
echo /swapfile none swap sw 0 0
sudo -e /etc/fstab
cat /proc/sys/vm/swappiness
sudo sysctl vm.swappiness=10
cat /proc/sys/vm/swappiness
echo vm.swappiness=10
sudo -e /etc/sysctl.conf
cat /proc/sys/vm/vfs_cache_pressure
sudo sysctl vm.vfs_cache_pressure=50
echo vm.vfs_cache_pressure = 50
sudo -e /etc/sysctl.conf
The article from digital ocean is here