Creating a swap space in Linux

Tried Digital ocean’s droplets, the cheapest ones.

And tried to install n8n on them via npm and had following error:

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory

As error log tells, I need to tell npm to use less memory. I set heap ceiling limit for node with NODE_OPTIONS="--max-old-space-size=512". Still receiving the same error.

Then I figured out that there is no swap space set in the VM! Probably digital ocean does not set it up since my droplet’s RAM is too low.

Anyway, I have learned how to setup swap space in Ubuntu 23.10 today.

After a while, I found out there is a guide on setting up n8n on a Digital ocean droplet with docker. Yet, I’ve learned something today 🙃