Does anyone know of a good source out there - or possibly can answer this in here - that can guide me as to how many Fast-cgi processes and Nginx processes I need to have running to serve a moderatly popular website. Between 75-100k pageview / day, quite intensive PHP-filled pages with decent cache for the heavy queries in mysql.
I'm using Apache mod_php today and is relatively new to running php as cgi but the early setup I've done using APC + Memcache + Nginx + PHP-FPM (fast cgi) on PHP 5.3.0 is very fast and not consuming too much memory under very light load. However, I'm unsure how I could test this under heavy load without moving my most popular site on it but I don't want to do that until I know if my current settings of 5 cgi processes and 5 nginx processes is enough.
Thanks