There are two communication methods between nginx and php-fpm. One is TCP and the other is unix socket. Which one is better?

Question

Looking at other people’s blogs, it is said that Unix socket is not so stable

Answer 1

• unix socket is suitable for both nginx and php-fpm on the same machine

• TCP is suitable for nginx and php-fpm not on the same machine

• TCP communication also requires three handshakes

• Production environment, if high availability is considered. There will be multiple nginx used with multiple php-fpm

• I haven’t paid attention to the performance

Answer 2

Meaning that I have not taken care of this thing, it is all configured and used directly by nginx. It is a unix socket, right