There are several places where you can specify limits. Some of them are available in the panel, but I can't find some!
I found this: worker_connections 51200;
These settings are not in the panel, although they are just as important:
/etc/security/limits.conf
* soft nofile 65535
* hard nofile 65535
and
/etc/systemd/system/nginx.service.d/override.conf
[Service]
LimitNOFILE=65535
I can't find where I can edit php8.3-fpm, there is no standard way to do it. I need to add
[Service]
LimitNOFILE=65535
Server:
Ubuntu 24.04.2 LTS
Nginx 1.27.4
PHP 8.3.15