I run a 512MB droplet from Digital Ocean with nginx, php-fpm with APC, and MariaDB. I've added some caching stuff to my nginx configs for my sites, and they all load very quickly, but I'm wondering if using Varnish will boost things at all.
I don't get a lot of traffic so maybe it's not a good idea, especially since I read nginx is very good by itself with static content, but most of my sites are PHP scripts.