i have 32GB RAM server for moodle even after conducting quiz for 150 it is slow , how can i increase the performance of the moodle quiz
32GB is a LOT, but it's not the RAM that determines your moodle performance.
How much of RAM have you allocated to DB? assuming its residing on same server?
and you havent mentioned about your hardware and software configuration.
You can check my blog about conducting quiz with 500 student. 12 GB will be enough RAM but you should take care of the CPU. You can check RAM and CPU graph in my blog post.