During the month of May there was a spike in the amount of busy apache slots. What could have caused this spike?
If you look at Google Analytics (included below) there isn't really a change of traffic during May.
I also included the mysql graph to show that I enabled mysql caching at one point but I doubt it would cause more busy apache process.
Question
- What could have caused this busy server spike?
Stats
- Apache process: https://i.stack.imgur.com/1jYnO.png
- Mysql: https://i.stack.imgur.com/5fifr.png
- Google Analytics: https://i.stack.imgur.com/RTeMj.png