FreeBSD 12.1 sysctl optimization for Web server

[Handreas]

Hi everyone.

Could you please have a look at the following sysctl.conf optimisation of
mine on a FreeBSD 12.1 box that'll be running only on the purpose of web
serving with a good amount of traffic, PHP-FPM, Nginx and MariaDB, with
10Gbe NIC card, 2 Gbit Up/Down connection:

https://pastebin.com/TWL6DfFP

The priority here is, stable Nginx connections/requests, and fast enough.
The server has enough hardware specs, carrying 64GB ddr4 ram and a Xeon
cpu.

Any suggestions, additions would be much appreciated.

Thank you.