Moodle quiz is very slow or sometime freeze when participants inctrease to more than 70 or 80. We tried the quiz for 300 participants but strangely it strated responding slow or freezing. Quizs with few participants say 40-50 having no trouble.
We are using a high end server with following configuration.
CPU: Dual cpu xeon 40 core each.
RAM: 128 GB
Hard Drive: 2TB SSD
Moodle version: 3.4
While observing the resources of the server during the large quiz, we found that no resources were being used and stll it was responding slow. CPU usage were 5%, RAM usage were 3-4 GB only and network usage were showing 10-20 mbps only.
Is there any configuration which we need to do in moodle to get all the server resources to be utilized optimally.
The server freeze only during the large quiz, it's working fine otherwise.