Redis (Remote Dictionary Server) is an in-memory database structure with multiple features that improve the availability and performance of a website. It is an open source project created by Salvatore Snfilippo in early 2009 for his technology startup.
We’ll explore the many benefits Redis has to offer in this article and how using it can help speed up your website, including WordPress.
What is Redis Object Caching?
As a whole, Redis can be used for a wide range of benefits, one of which is object caching.
According to its getting started documentation, Redis defines its technology as:
“[Providing] data structures such as strings, hashes, lists, sets, ordered sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams. Redis has built-in replication, Lua scripts, LRU eviction, transactions, and different levels of persistence to disk, and provides high availability through Redis Sentinel and automatic partitioning with Redis Cluster.”
The main takeaway new users need to understand is that Redis is a data structure system, which organizes data in its own way to better deliver your messages, improving the performance of your website or application.
Redis supports most programming languages, such as:
Redis attracts many users due to its many benefits, some of which include:
High performance and low latency The ability to handle large data sets Clustering ability Fast data manipulation tasks
What is Redis used for?
Now that you know the definition of Redis and what some of its features are, let’s dive into why some developers prefer to use Redis as a way to improve website performance.
One of the main benefits of Redis is its speed. With data stored in memory, Redis can perform operations much faster than traditional databases. This makes it ideal for applications that need fast data retrieval and modification. Redis can handle up to 500,000 operations per second, making it suitable for even the most demanding applications.
Data can be backed up to disk at regular intervals, ensuring that all data stored on Redis will be protected even in the event of a server failure.
Redis also offers a wide range of data structures, making it ideal for applications that need to process complex data. Redis supports five different data structures, including strings, hashes, lists, arrays, and ordered sets.
Redis supports built-in scripting, which allows developers to write scripts to change data structures and perform complex operations without having to write a custom application. It also makes it easy to add new features and optimize existing applications.
How can Redis help my WordPress VPS run faster?
Redis is a powerful tool that can speed up a WordPress VPS by providing an in-memory key-value store for caching data, reducing the need for database queries and enabling faster data retrieval.
It can also be used for message queues and pub/sub communication, further improving VPS performance.
Redis also reduces the number of requests to the database, which increases website speed by caching pages, objects, and database queries.
Finally, Redis caching can even store user sessions, which reduces server load and improves the user experience.
WordPress and Redis caching systems
The Redis in-memory data structure can be used to store and retrieve cached data on WordPress websites. These applications are known as WordPress Redis Caching Systems.
This caching system can store a wide variety of data and is capable of providing high-performance caching for high-traffic WordPress sites. It’s also easy to set up and manage, and is feature-rich, including data replication, high availability, and scalability.
Blogger Metrics breaks down the 3 types of caching as follows:
Server Side Caching – Caching at the server level. The NGINX FastCGI cache and Varnish page caching are two examples of server-side caching. Another example of server-side caching is object caching. WordPress Side Caching – WordPress level caching. Plugins like W3 Total Cache, WP Rocket, WP Super Cache, all are examples of caching on the WordPress side. Client-side caching – Caching at the local browser level. The browser cache is an example of client-side caching.
The 8 Different Types of Caching Within WordPress
Expanding on the above information further, WordPress caching can be divided into the following sections.
Redis and WP-CLI
WP-CLI is a command line interface for managing WordPress sites, ideal for complex tasks and time-consuming modifications through the user interface.
This interface can be used to administer Redis by providing commands to interact with the Redis server.
Redis database cleanupSetting expiration timersManipulating individual keys
WP-CLI can also be used to view and change configuration settings associated with a Redis instance, allowing users to quickly make changes to their Redis configuration.
Redis is an impressively powerful and versatile tool that can be applied to solve a wide variety of problems. It’s fast, reliable, and easy to use, making it an ideal choice for many applications.
Whether you’re looking for a simple caching solution or a complete data store, Redis can give you the performance and scalability you need.
Overall, Redis and WordPress are a great combination for web developers and freelancers looking to build powerful and efficient WordPress websites, while maximizing speed and performance to enhance the user experience.