![\"Fastcgi_cache](\"https:\/\/linuxadmin.io\/wp-content\/uploads\/2017\/05\/fastcgi_nginx_cache.png\")
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Caching PHP requests can dramatically reduce server resources per request and make the pages load time decrease substantially. In this tutorial we are going to utilize the fastcgi_cache functions in nginx to cache PHP requests making it.<\/p>\n
This tutorial assumes you have the following already completed on your server: It also assumes you already have a WordPress installation as this will just cover setting up the fastcgi_cache to work with WordPress.<\/p>\n First make a directory in \/var\/run , this is where the fastcgi_cache will store the files in memory<\/p>\n mkdir \/var\/run\/nginx-cache<\/p>\n You will then need to edit the Nginx configuration<\/p>\n nano \/etc\/nginx\/nginx.conf<\/p>\n You will want to add the following lines in the http{} block before the server{} configuration<\/p>\n fastcgi_cache_path \/var\/run\/nginx-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m; The above lines set the caching directory, cache levels and keys_zone. The fastcgi_cache_use_stale option will try to use cached files even if PHP-FPM has crashed or has been shutdown.<\/p>\n You will then want to add the following to the server{} configuration:<\/p>\n add_header X-Cache $upstream_cache_status;<\/p>\n What this does is allows you to see if Nginx is caching a request later on<\/p>\n if ($request_method = POST) { if ($request_uri ~* “\/wp-admin\/|\/xmlrpc.php|wp-.*.php|index.php|\/feed\/|sitemap(_index)?.xml”) { if ($http_cookie ~* “comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in”) { The above statements allow you to bypass the cache when you are logged into the administrative interface etc.<\/p>\n Add the following to location ~ .php$ {} block that sends the PHP requests to PHP-FPM<\/p>\n fastcgi_cache_bypass $skip_cache; The above block fast_cache_valid entries specify which type of requests to cache and for how long.<\/p>\n And finally add a purge folder to in the server{} configuration:<\/p>\n location ~ \/purge(\/.*) { Once all of that has been completed, you can go ahead and restart nginx.<\/p>\n \/etc\/init.d\/nginx restart<\/p>\n You will then want to cd to the wp-content\/plugins directory and get the Nginx Helper plugin<\/a><\/p>\n wget https:\/\/downloads.wordpress.org\/plugin\/nginx-helper.1.9.10.zip<\/p>\n Uncompress the zip file<\/p>\n unzip nginx-helper.1.9.10.zip<\/p>\n Activate the plugin in WordPress and select the following options: Enable Cache<\/p>\n Under Caching Method select:<\/p>\n Nginx FastCGI cache<\/p>\n Under Purge Method select:<\/p>\n Using a GET request to PURGE\/url(Default option)<\/p>\n And click save to save the configuration.<\/p>\n To test you should now try a curl to check the headers to ensure a HIT for the X-Cache header We set earlier.<\/p>\n # Curl -Is http:\/\/domain.com |grep X-Cache If this is the first request to that page since the cache has been active that is expected. A MISS means the page has not been cached yet.<\/p>\n On subsequent requests you should see<\/p>\n # Curl -Is http:\/\/domain.com |grep X-Cache If you do get a X-Cache: BYPASS one of the rules we set earlier is causing the cache to be ignored. Try testing your site in one of the various speed test programs such as https:\/\/tools.pingdom.com you should notice a much improved load time over a non-cached WordPress install.<\/p>\n May 29, 2017LinuxAdmin.io<\/p>\n
\nNginx installed, if you do not please follow \u2013 Nginx Compile From Source On CentOS
\n<\/a>The ngx_cache_purge module already installed \u2013 How to install the ngx_cache_purge module in Ningx<\/a>
\nFastCGI setup and running \u2013 PHP-FPM Installation<\/a><\/p>\nNginx fastcgi_cache Configuration<\/h3>\n
\nfastcgi_cache_key “$scheme$request_method$host$request_uri”;
\nfastcgi_cache_use_stale error timeout invalid_header http_500;
\nfastcgi_ignore_headers Cache-Control Expires Set-Cookie;<\/p>\n
\nset $skip_cache 1;
\n}<\/p>\n
\nset $skip_cache 1;
\n}<\/p>\n
\nset $skip_cache 1;
\n}<\/p>\n
\nfastcgi_no_cache $skip_cache;
\nfastcgi_cache WORDPRESS;
\nfastcgi_cache_valid 200 302 60m;
\nfastcgi_cache_valid 301 1h;
\nfastcgi_cache_valid any 1m;<\/p>\n
\nallow 127.0.0.1;
\ndeny all;
\nfastcgi_cache_purge WORDPRESS “$scheme$request_method$host$1”;
\n}<\/p>\nNginx Helper Plugin Configuration<\/h3>\n
\nUnder Purging Options select:<\/p>\n
\nX-Cache: MISS<\/p>\n
\nX-Cache: HIT<\/p>\n