The server 4 times a day is completely clogged by 100% for CPU and 100% for RAM. Cause?

Question

Nginx

Hi all. We use nginx + php-fpm + mysql + laravel framework. In other words, LEMP.
I noticed that 4 times a day the server is 100% full. For about 5 minutes everything completely falls down and the server does not respond. It takes 5 minutes - everything is fine.
How to identify the cause? With using what?
What could be the reasons? If the reason is in the code, then how to trace the weak spot in the code?

Answer 1

Set up monitoring. For example zabbix.
For mysql and nginx, you can enable logging of slow queries.

Answer 2

Learn server administration (top, iostat, ps, show processlist, logs, etc.) or contact a good admin.
If the problem occurs regularly at the same time, check cron first.

Answer 3

clogged 100% for CPU and 100% for RAM

If there is not enough RAM, then the swap starts pumping, because of this, everything slows down. Look for tasks that eat up all the RAM.