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Configure NGINX FastCGI Cache WordPress on aaPanel

by Thạch Phạm
Published: Last Updated on

What is NGINX FastCGI WordPress Cache? Referring to the Cache configuration, it is probably no stranger to anyone when deploying a website. The cache is considered the “backbone”, deciding the performance and speed of the website. Assuming your website serves hundreds and thousands of visits per day, not implementing a cache will make the system always in an overloaded state because it has to receive requests and respond to responses continuously. When you have implemented the cache, it will reduce the response load to help the server be idler.

NGINX is a popular, high-performance web server that can host WordPress websites. In addition to being a web server, it can also be used as a reverse proxy, mail proxy, load balancer, and HTTP cache.

According to W3Techs, 32.1% of websites are installed on NGINX servers (as of May 25, 2020)

Speed up websites with NGINX FastCGI Cache

Implementation Guide

Step 1: Create the fastcgi-cache directory

You need to create a fastcgi-cache directory to store cache, you use the following command to create it quickly.

mkdir /var/run/fastcgi-cache


  • mkdir: command to create directory
  • /var/run/fastcgi-cache: directory created

Step 2: Configure the domain.conf file

You access Website => Configuration to go to advanced settings.

Configure NGINX FastCGI Cache WordPress on aaPanel 6.x

You select Config and enter the code below on the server line as shown below:

Screenshot 2021 08 31 at 13.40.02
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_cache_path /var/run/fastcgi-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m;
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;


fastcgi_cache_key: NGINX uses them to compute a request’s key (identifier) Importantly, to send a cached response to the client, the request must have the same key as a cached response.

  • $scheme: Requires HTTP or HTTPS scheme
  • $request_method: The request methods are usually POST or GET
  • $host
  • $request_uri: Request URL

fastcgi_cache_path: Specify the number of parameters.

  • /var/cache/nginx: Directory path for cache.
  • levels: Defines the cache hierarchy
  • keys_zone (name:size): This allows the creation of a shared memory area where all active keys and data (meta) information are stored. Note that storing keys in memory speeds up the check by making it easier for NGINX to determine if it’s MISS or HIT without checking the disk state.
  • inactive: Specifies the length of time after cached data that has not been accessed within the specified time is cleared from the cache. A value of 60m in the example configuration means that files that are not accessed after 60m will be removed from the cache.

Then you move to # the include enable-php-73.conf line.

Configure NGINX FastCGI Cache WordPress on aaPanel 6.x

If your website has SSL (HTTPS) installed and enabled, add the following code after the # SSL-END line as shown below:

Configure NGINX FastCGI Cache WordPress on aaPanel 6.x
set $skip_cache 0;
        if ($request_method = POST) {
            set $skip_cache 1;
        if ($query_string != "") {
            set $skip_cache 1;
        if ($request_uri ~* "/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {
            set $skip_cache 1;
       if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {
            set $skip_cache 1;
       location ~ [^/]\.php(/|$)
                try_files $uri =404;
                fastcgi_pass unix:/tmp/php-cgi-73.sock;
                fastcgi_index index.php;
                include fastcgi.conf;  
                add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
                fastcgi_cache_bypass $skip_cache;
                fastcgi_no_cache $skip_cache;
                add_header X-Cache "$upstream_cache_status From $host";
                fastcgi_cache WORDPRESS;
                add_header Cache-Control  max-age=0;
                add_header Nginx-Cache "$upstream_cache_status";
                add_header Last-Modified $date_gmt;
                add_header X-Frame-Options SAMEORIGIN;
                add_header X-Content-Type-Options nosniff;
                add_header X-XSS-Protection "1; mode=block";
                etag  on;
                fastcgi_cache_valid 200 301 302 1d;

        location ~ /purge(/.*) {
            allow "change_to_your_server_ip";
            deny all;
            fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";

Note: The line has the allow “change_to_your_server_ip” paragraph; please replace it with the IP of the server you are using. If not, you will get the following error:

Configure NGINX FastCGI Cache WordPress on aaPanel 6.x

You allow IP and then save.

CleanShot 2020 10 03 at 13.17.58@2x

Next, reload nginx with the command:

service nginx reload
Configure NGINX FastCGI Cache WordPress on aaPanel 6.x

Step 3: Install and Configure NGINX FASTCGI with Nginx Helper

To combine the communication environment between the website and the web server, you will install a plugin for the combined installation. will use Nginx Helper Plugin to configure.

Configure NGINX FastCGI Cache WordPress on aaPanel 6.x

To add a configuration file to wp-config.php go to the open source file wp-config.php and add the following line:

define('RT_WP_NGINX_HELPER_CACHE_PATH', '/var/run/fastcgi-cache');

After adding the configuration file, go back to the WordPress admin and enable the options as shown in the image below:

CleanShot 2020 10 03 at 13.22.59@2x
CleanShot 2020 10 03 at 13.23.10@2x

To start checking, save the settings and open the website in an incognito browser. Next, you open the browser debug, then move to the Network Tab to load. Finally, select the website and see if the Headers cache is HIT or MISS.

CleanShot 2020 10 03 at 13.24.32@2x

So AZDIGI has completed the steps to configure NGINX FASTCGI on aaPanel. Hopefully, this article will help you set up a website with high performance, web loading speed and TTFB to be improved more.

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