wordpress-memcached-nginx-combo

Wordpress full page caching using NGINX & Memcached. No plugins required.

I saw this post on Blazing fast WordPress with Nginx and Memcached

I modified it but full credit goes to Joseph Wynn

The original relies on PHP to get the content from WordPress and save/get it from Memcached. NGINX has a memcached module that can retrieve the content that been set from the PHP code. This will reduce latency as NGINX will directly serve the content from Memcached rather than going to PHP. This requires the ngx_http_memcached_module module. Run nginx -V to see if it's included in your setup. It's easy to add if it's not.

How to install

• Copy/move index-cached.php on your WordPress home folder.
• Copy/move memcached.conf inside /etc/nginx
• Add the line include memcached.conf; inside your /etc/nginx/sites-enabled/whatever.conf file:

server {
    listen 80;
    root /var/www/your/root/folder;
    ...
    include memcached.conf;
}

• I've added a file security.conf if you want to secure your WordPress site further. To use it, copy/move security.conf inside /etc/nginx, then add this line: include security.conf; below include memcached.conf.

Test, run and you should see some debug stuff at the end of each page when a page gets cached for the first time. Subsequent caches will not display the debug stuff because it's being served directly by nginx.

Notes:

• Use PHP-FPM sockets because it's faster.
• Play around with $cacheTime depending on how often you update your site. Homepage is cached 30min, archive pages 1day, other pages 1hr.
• If your site is responsive, you can comment out the browser checks inside memcached.conf.
• If you're using W3 Total Cache, disable Full Page Caching for this to work.
• For additional performance gain, enable query caching in MySQL:

query_cache_limit = 1M
query_cache_size = 16M
query_cache_type = 1

TODOS:

• Make a plugin that will automatically purge post from Memcached when saved. DONE
• Make a plugin that will make search results SEO friendly and cacheable. DONE
• RSS Feeds and JSON returns text/html instead of application/rss+xml & application/json respectively. FIXED

Need help? DM me: https://twitter.com/111110100