Cakephp 2x on wampserver for offline local examination

Hi, I have an online examination system build with cakephp 2. I’m running the exam on offline using windows server 2012 r2 based on client need, presently I’m having issues with my wampserver that I’m using when students are up-to 200 concurrently it will become very slow during this time my CPU is 28% memory 10% please guys I need help thanks in advance

Check what happens with MySQL.
Apache limit connections.
I see in google enough info about optimisation.
I’ts just ideas . I use for test stand Vagrant.