Kevin Ohashi, The Founder at Review Signal published very useful post about high traffic handle with a small vps from digital Ocean. In this article he was inspired by Ewan Leith’s post 10 Million hits a day on WordPress using a $15 server. Ewan built a server that handled 250 users/second without issue using Varnish, Nginx, PHP-APC, and W3 Total Cache.
Whoever, Kevin get this 40 million hits on a small vps hosted by Digital ocean and using LEMP+PHP-FPM. on a ubuntu.
Here is the most detailled article about performance and optimisation of wordpress on a small vps.
Good luck for test 🙂
HERE IS THE ARTICLE : 40 Million hits a day on WordPress using a $10 VPS