A question can only have one accepted answer. Are you sure you want to replace the current answer with this one?
You previously marked this answer as accepted. Are you sure you want to unaccept it?
As of January ‘17, DigitalOcean launched a service that provides better graphs which includes the ability to track RAM/Memory usage over time. To read more about this, see capabilities and get instructions for how to get this functionality for your Droplets, check out this link to the official blog post: https://www.digitalocean.com/company/blog/improved-graphs/