Solved httpd + php-fpm74 take a lot of resources and site unavailable

[Erulezz]

And what logs should I analyze, there are a lot of them.

Did you check the domain usage log? And how many requests there are roughly per second? Try to block all the AI bots, starting with robots.txt (google ai block robots.txt). And with suggestions earlier in the topic

Or if you don’t have any customers in Asia use Cloudflare to block all traffic from Asia a week ago i had problems with an phpBB forum and switched to Cloudflare.. ~700.000 blocked bot requests in less than 24 hours

 

[Richard G]

We also had attacks from both Alibaba and Google Cloud ip's causing high server loads. So we ended up blocking them all.
I like Cloudflare but don't want to use it because I don't want to put the nameservers to Cloudflare for customer domains.
There is a topic about blocking bots in httpd-includes.conf which helped me very well too.