How to optimize and secure nginx and php-fpm

I had a inquiry from a customer about a web servers that was producing random 502 errors. This is the type of error you typically see from php-fpm when something upstream has not worked properly (which most of us think of downstream but that’s a different story). Thankfully php-fpm was logging so that helped me see that the server was hitting the MaxClient frequently.

Show performance metrics

php-fpm config