Wordpress Fast Method Cache

No such thing as method 2 nginx purge cache isn't a caching method.

In context of Wordpress caching.

A. fastest but most problematic with most amount of work and constant fine tuning = nginx + proxy_cache (static) + fastcgi_cache (dynamic) or nginx and varnish caching (default varnish cache out of box won't cut it so needs customised tailored vcl rules/config for your web apps' static and dynamic assets). Higher chance of revealing private user/logged in data to guest/visitors if not careful. But with right configuration allows caching of both logged in and logged out/guest caching if done right. Just installing Varnish Cache without proper vcl configuration won't do much and 90% of tutorials out there only configure for guest caching not logged in users.

B. redis caching at nginx level can be faster but like varnish cache and nginx fastcgi_cache + nginx proxy_cache needs fine tuning and deep understanding of your web app and it's plugins to get right i.e. woocommerce etc. So can be problematic too. Most configs are for guest caching only.

C. keycdn cache enabler wp plugin - better version of wp super cache for full page static caching of wordpress. Least problematic and closest to set and forget with maybe some tuning needed depending on wp plugins and site configuration. Config is for guest caching only.

And regardless of caching method, having right server(s) hardware and configuration and LEMP stack and system TCP level configurations to handle the traffic is a must otherwise regardless of caching used, it won't scale. 2 million unique visitors/day is definitely a multi server configuration requirement. Most I've ever had to deal with for my paying consult clients was around 550,000 unique ip visitors/day pushing around 14,000 requests/s heh (without cloudflare).

FYI, all caching methods = generally higher memory consumption and sometimes higher cache related cpu consumption. The goal of caching in context of wordpress is usually to lessen the load placed on php/php-fpm as that is the weakest part of any LEMP/LAMP setup in terms of scalability. So sometimes caching isn't necessary faster just scales better in high concurrent traffic environments.

 

Yeah Cloudflare caching will take alot of load off the backend server(s)

 

Centmin Mod 123.09beta01 for non-openvz systems already auto tunes TCP for 80% of situations. For rest google search and read 100s of guides to get grasp - how I learn here

 

WP Rocket is a paid plugin so haven't tested it myself.

 

thanks for sharing that link.. Cache Enabler definitely looking good