nginx fastcgi cache wordpress how to configure

Implementing/install

etc/Nginx.conf or

the domain configuration file (server block)

fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=FASTCGICACHE:100m inactive=60m;
fastcgi_cache_key “$scheme$request_method$host$request_uri”;
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

Directory block

set $skip_cache 0;

# POST requests and urls with a query string should always go to PHP
if ($request_method = POST) {
set $skip_cache 1;
}

if ($query_string != “”) {
set $skip_cache 1;
}

# Don’t cache uris containing the following segments
if ($request_uri ~* “/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml”) {
set $skip_cache 1;
}

# Don’t use the cache for logged in users or recent commenters
if ($http_cookie ~* “comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in”) {
set $skip_cache 1;
}

PHP location block:

fastcgi_cache_bypass $skip_cache;
fastcgi_no_cache $skip_cache;
fastcgi_cache FASTCGICACHE;
fastcgi_cache_valid 60m;
add_header X-FastCGI-Cache $upstream_cache_status;

fastcgi configuration nginx

Configuring values

verifying

HIT – returned from the FastCGI cache.
•MISS – missed
•BYPASS – cached but bypass ex: admin pages.

using command line

curl -I https://yoursite.com

or chrome tools

right click >> inspect>>network>>select main HTML file >> check headers.

Test results

loader, any load testing tools

2nd way to configure FastCGI cache in nginx

nginx.conf file

# Fastcgi cache

fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=WORDPRESS:400m max_size=812m inactive=60m;

fastcgi_cache_key “$scheme$request_method$host$request_uri”;

fastcgi_cache_use_stale error timeout invalid_header http_500;

fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

add_header Fastcgi-Cache $upstream_cache_status;

server block.file

fastcgi_cache_bypass $skip_cache;

fastcgi_no_cache $skip_cache;

fastcgi_cache WORDPRESS;

fastcgi_cache_valid 60m;

fastcgi_temp_file_write_size 10m;

fastcgi_busy_buffers_size 512k;

fastcgi_buffer_size 512k;

fastcgi_buffers 16 512k;

fastcgi_connect_timeout 300;

fastcgi_send_timeout 300;

fastcgi_read_timeout 300;

fastcgi_intercept_errors on;

fastcgi_next_upstream error invalid_header timeout http_500;

3rd way of

/etc/nginx/conf.d/fastcgi.conf

fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m

fastcgi_cache_key “$scheme$request_method$host$request_uri”;

fastcgi_cache_use_stale error timeout invalid_header http_500;

fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

top of the file outside the server { } directive:

fastcgi_cache_path /etc/nginx/cache levels=1:2 keys_zone=MYAPP:100m inactive=60m;

fastcgi_cache_key “$scheme$request_method$host$request_uri”;

location ~ \.php$ {

try_files $uri =404;

fastcgi_pass unix:/var/run/php5-fpm.sock;

fastcgi_index index.php;

include fastcgi_params;

fastcgi_cache MYAPP;

fastcgi_cache_valid 200 60m;

explanation

fastcgi_cache fideloper; fastcgi_cache_valid 200 60m; # Only cache 200 responses, cache for 60 minutes fastcgi_cache_methods GET HEAD; # Only GET and HEAD methods apply add_header X-Fastcgi-Cache $upstream_cache_status; fastcgi_cache_bypass $no_cache; # Don’t pull from cache based on $no_cache fastcgi_no_cache $no_cache; # Don’t save to cache based on $no_cache

fastcgi_cache_path /tmp/cache levels=1:2 keys_zone=fideloper:100m inactive=60m; fastcgi_cache_key “$scheme$request_method$host$request_uri”;

other resources

redis object caching

best location for FastCGI cache

df -h /var/run

20% your server RAM

Defaults to 10% core memory (debian)

1 gb

mkdir /var/run/nginx-cache

fastcgi_cache_path /usr/share/nginx/cache/fcgi levels=1:2 keys_zone=microcache:10m max_size=1024m inactive=1h;
add_header X-Cache $upstream_cache_status;

Additional fast CGI settings for nginx.conf

fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=WORDPRESS:50m inactive=60m;

fastcgi_cache_key “$scheme$request_method$host$request_uri”;

fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503;

fastcgi_cache_valid any 1h;

fastcgi_buffers 16 16k;

fastcgi_buffer_size 32k;

fastcgi_param SERVER_NAME $http_host;

fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

fastcgi_temp_file_write_size 10m;

fastcgi_busy_buffers_size 512k;

fastcgi_buffer_size 512k;

fastcgi_buffers 16 512k;

fastcgi_connect_timeout 300;

fastcgi_send_timeout 300;

fastcgi_read_timeout 300;

fastcgi_intercept_errors on;

fastcgi_next_upstream error invalid_header timeout http_500;

Purging

location ~ /purge(/.*) {
fastcgi_cache_purge WORDPRESS “$scheme$request_method$host$1”;
}

install this to purge content automatically when wp pages updated.

Nginx Cache

other related

APC or Redis for WordPress, Opcode cache, page speed module, improve MySQL performance.

How I configured FastCGI cache for WordPress in 2019 nginx version 15+

df -h /var/run
Filesystem Size Used Avail Use% Mounted on
tmpfs 370M 892K 369M 1% /run

free -m
total used free shared buff/cache available
Mem: 3693 1415 1485 186 792 1851
Swap: 0 0

my var/run file size 10% of core ram (3.7Gb) so i allocated 200M or 100m for fastcgi

sudo mkdir /var/run/nginx-cache

cd /var/run/

mkdir nginx-cache

mv nginx-cache fastcgicache

granting permission to server user (www-data:www-data or nginx runs as root)

sudo chown www-data:www-data -R /var/run/fastcgicache

This time i want to create a separate file for FastCGI

nano /etc/nginx/conf.d/fastcgi.conf

fastcgi_cache_path /var/run/fastcgicache levels=1:2 keys_zone=FASTCGICACHE:100m inactive=60m;
fastcgi_cache_key “$scheme$request_method$host$request_uri”;
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

my default server’s php location block or global config file all domains

fastcgi_cache_bypass $skip_cache;
fastcgi_no_cache $skip_cache;
fastcgi_cache FASTCGICACHE;
fastcgi_cache_valid 60m;
add_header X-FastCGI-Cache $upstream_cache_status;

finally reloading Server

nginx -t && nginx -s reload

checking

curl -I https://website.com

1st time

x-fastcgi-cache: MISS

2nd time

x-fastcgi-cache: HIT

anyway, its done need to enhance and implement object cache /page cache etc.

I need to check TTFB (time to first byte Aka server response time before fast CGI 800ms

after 1022 ms (you know it depends on many factors just ignoring it right now)

Conclusion: this post may confuse you, but over time it will be improved, my case page TTFB was high 800ms (but i implemented, opcode cache, APC /Redis along with fast CGI) now i realized when i migrated I have used default nginx config file not my exist.