Wordpress site running extremely slow
I have a 1 GB Memory / 25 GB Disk / NYC3 droplet (1 VCPU) running on CentOS 7.4.1708 x64 running with VestaCP with two different Wordpress sites on there. Cloudflare is enabled in addition to a WP Cache plugin
The site was running great a few days ago but lately it has become extremely slow (5-10second load times) - what kind of diagnostics can I do to see what the problem is? Should I consider increasing the memory and CPU? I don't have that much traffic at all - like 10 visitors a day right now.