Hardware and performance

Apparently there was a server issue on our end too.  In looking at our server to see about performance I noticed there were server updates and a few other things.  It dropped to around 800mhz with an average of about 100 kids the last two days.

With NGINX you shouldn't have any issues.  It should be way better out of the box for this.  Howeever, I really like Apache with Event_MPM and PHP-FPM.  

Quizzes seem to require a lot of back and forth with the database.  Do you have your database server optimized with caches and all that stuff?