How to speed up WordPress with Redis Caching

In this tutorial, we will teach you how to speed up WordPress with Redis Caching in a few simple steps.

What is Redis:

Redis is an in-memory database which you can use as a data store or cache. Redis is a good solution to speed up WordPress or any other software which supports Redis caching.

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speed up WordPress with Redis Caching

Here, we have listed all guide step by step for you;

Step 1: Installing Redis on a Linux VPS.

This guide assumes that WordPress was already installed on your system. For this reason we will skip over the WordPress installation step.

The installation of Redis is straightforward. If you have an Ubuntu VPS, execute the command below to Install Redis.

apt-get install redis-server

If you have a VPS, simply use the following command to install Redis.

yum install redis

Please ensure that you have EPEL (Extra Packages for Enterprise Linux) repo enabled on your server.

Start and enable Redis on system boot.

systemctl start redis.service
systemctl enable redis.service

Step 2: Install Redis PHP extension on a Linux VPS.

If you want to be able to use Redis as an object cache for your WordPress website, you will have to install the Redis PHP extension which should allow WordPress to communicate with Redis key-value store.

For Ubuntu execute the command below.

apt-get install php-redis

For CentOS execute the command below.

yum install php-pecl-redis

Step 3: Install Redis Caching Plugin in WordPress.

Log into your WordPress Dashboard and go to ‘Plugins > Add New’. Look for Redis and install the Redis Object Cache plugin from the list. After the installation is finished, go to ‘Plugins’ once more and activate the ‘Redis Object Cache’ plugin.

Now, go to ‘Settings > Redis’ and press on ‘Enable Object Cache’ so that object caching is enabled in WordPress.

The default configuration will work out of the box as the default Redis listening address is 127.0.0.1 and the default listening port is 6379.

Step 4: Verify Redis caching on WordPress.

To see whether the WordPress caching works well with Redis, you can simply connect to your server with SSH and execute the command below.

redis-cli monitor

If you use the Redis monitor, you should be able to see every request which is processed by the Redis server; it should help you figure out what is happening to the database. The output will look similar to the one below.

# redis-cli monitor
OK
1510415208.863435 [0 127.0.0.1:50076] "PING"
1510415208.865491 [0 127.0.0.1:50076] "GET" "wp_:default:is_blog_installed"
1510415208.870259 [0 127.0.0.1:50076] "GET" "wp_:options:notoptions"
1510415208.870433 [0 127.0.0.1:50076] "GET" "wp_:options:alloptions"
1510415208.871197 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.875126 [0 127.0.0.1:50076] "GET" "wp_:options:uninstall_plugins"
1510415208.882241 [0 127.0.0.1:50076] "GET" "wp_:wordfence:alloptions"
1510415208.913368 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.913547 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.916283 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.916434 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.947299 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.947480 [0 127.0.0.1:50076] "GET" "wp_:options:can_compress_scripts"
1510415208.947637 [0 127.0.0.1:50076] "GET" "wp_:site-options:1:notoptions"
1510415208.954565 [0 127.0.0.1:50076] "GET" "wp_:posts:last_changed"

Enabling WordPress caching with Redis is pretty simple to do, this should be all.

We hope that this tutorial helped you move your WordPress to a new domain name. If this tutorial helped you, then please don’t forget to share it. We appreciate all retweets, likes, and +1s. Lastly, let us know about your experience and/or questions by leaving a comment below.
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