Apache2 hangs, is it possible to fix it?

Question

Apache HTTP Server

apache2 just hangs from time to time. Logs after sites stop responding.

Moreover, bots (or not bots) are breaking down non-existent paths (I can’t even imagine how it happened). Sometimes referrals skip all sorts of escort services, " yandex.ru/images/........... " and other strange things.
The apche2 process is running. It's just that nginx gives a 502 error sometimes there is no connection at all. VPS(FastVPS).
Somehow I twisted the Apache configs - it didn’t help.

Answer 1

You do not have enough memory for your settings, either reduce the number of fcgi workers or increase memory.

Answer 2

Do analytics on countries and networks on the web server port (usually 80,81,82) through a sniffer and you will understand what and where to block the excess ....