It happened on an ordinary Friday afternoon at around 6 pm. Suddenly, our traffic at autoplenum.de quadrupeled. Just like flipping a switch. Boom! There it was, tons of new users out of the clear blue sky.
My first concern was for our servers and their ability to deal with that peak load.
Luckily, I had finished my migration to newer servers with enough spare capacity only a few weeks earlier. Phew! They were acting as if nothing had happened.
After relaxing about the server capacity, my second look was at the type of traffic which was coming in.