Need help for configuration with Prestashop heavy

Hello pros!

I'm sorry to come with my stupid questions, but I find myself managing an unmanaged vps against my will.

We have a PrestaShop that requires a lot of requests, my host does not allow to modify the parameters necessary to use a very important module, so they advised us to move to an unmanaged server that allows to make more advanced configurations.

After spending a whole weekend testing distributions, I chose centos 7 with CPW.

After installing prestashop and a quick configuration in Php-fpm everything was fine until I installed another module...

It lags for hours and ends up with a 504 error.

I'm a big beginner! I think I probably forgot some configurations... I just modified some parameters in mysql and php.ini of php fpm 7.3 that's all.

Here is the server configuration:
CPU Model: AMD EPYC 7452 32-Core Processor
CPU Details: 4 Core (2346 MHz)
Distro Name: CentOS Linux release 7.9.2009 (Core)
Kernel Version: 3.10.0-1160.62.1.el7.x86_64
Platform: x86_64 kvm
12go of ram

Apache version: Apache/2.4.53
MySQL version: 10.2.43-MariaDB

When I look at the top 5 processes when the site lags, there is nothing about php-fpm, nothing that uses the processes...

I'm a bit lost.

I know there are server administrators, but I'm french, and I didn't find any who answered my call.


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Hello

Please go to the error log and tell us what you can see there!