My corporate website is going to change: the new one is ready on a different server. I have to put a countdown of 24 hours on the current site home page, at "hour 0" I will switch to the new website (IP address will be moved from the old server to the new one).
The current website daily traffic load peak is about 40req/sec. Switch is due at 9:00 am, at that time the load is usually 50% lower: max 20req/sec. The countdown does not refresh the page. Most of the traffic is done by anonymous users (90%). Here are current access statistics (1 month, Google Analytics): Sessions: 475.258 - Users: 151.132 - Page views: 1.611.529 - Pages/session: 3,39 - Avg. Session duration: 00:03:49 - Bounce rate: 50.38% - New sessions: 23.38%
Probably not useful, but for the sake of completeness my enviroment is a multitier installation of CMS Plone v.4.1.6: Frontend: Apache+Varnish Backend: 6 zeo clients (4x anonymous users, 2x authenticated users) OS: Debian 7 HW: 1VPS: 8GB RAM, 8 CPU (2,7GHz), 100GB DISK, 1Gb LAN
Is there a meaningful method to obtain an estimation of the load I have to deal with?