If I throw my MySQL/PHP app up on a Amazon EC2 instance (using their AWS Free Usage Tier program) and couple it with CloudFlare (the free plan of course) roughly how many daily visitors can I comfortably handle before performance starts to suffer? Just looking for a rough estimate or educated guess – I understand this setup might be less than ideal but I'm still very curious nonetheless.
Thanks in advance
Best Answer
It really depends on how much your app is cached at CloudFlare. I ran some basic tests a while back (for something completly different) and a micro instance in the US, running Varnish, with a WordPress server in the backend (in Germany) was able to handle 50 users at a time, and was not breaking a sweat. the German Server only had to respond to the Varnish box once. I used LoadImpact to do the testing...
If you can get your site to return fairly static pages, with a fairly long expiration date, it should stay in CloudFlare for a fair amount of time. your mileage may vary though.