Redis (Remote Dictionary Server) is an open-source, in-memory data structure store, used as a database, cache, and message broker. It supports various types of data structures like strings, hashes, lists, sets, sorted sets, and more. Redis can boost the performance of web applications such as WordPress by storing precomputed results of expensive queries and reducing the load on the database.
What is Redis? #
Redis is a high-performance database that supports key-value data. It operates on an in-memory dataset to deliver quick responses to queries. This means it stores the data directly in the RAM for lightning-fast performance.
Redis is often compared to other databases like MySQL or PostgreSQL. However, Redis operates mainly as a cache where data can be stored and retrieved rapidly. This fast data retrieval is a result of Redis’ storage mechanism where data resides in memory, unlike other databases where data is stored on disk.
How does Redis work with WordPress? #
By default, WordPress uses PHP to dynamically generate content every time a request is made. This involves making calls to the database to fetch data like posts, comments, users, and custom post types. This can be a resource-intensive process, especially for large websites with high traffic.
Redis can significantly improve WordPress performance by storing the results of these database queries in memory and serving them up almost instantly the next time the same query is made. This process is known as object caching.
How does Redis improve WordPress Performance? #
The benefits of using Redis with WordPress include:
1. Speeding Up Database Queries: Redis caches the results of database queries. When the same request is made, the data is retrieved from the cache instead of the database. This reduces the response time and load on the database.
2. Reducing Server Load: By limiting the number of requests made to the database, Redis effectively reduces server load. This is especially beneficial for high-traffic websites.
3. Scaling WordPress: Redis is highly effective for scaling WordPress because it reduces the number of direct database interactions. This makes it a suitable option for websites expecting rapid growth or spikes in traffic.
4. Reliable Performance: Redis can improve the overall performance of a WordPress site, ensuring a smooth user experience. It can be particularly beneficial for WooCommerce stores or other WordPress-based eCommerce sites where quick response times are crucial.
How to Implement Redis with WordPress? #
To implement Redis as an object cache for WordPress, you need to have a Redis server and the PHP Redis extension installed on your server. Once these are installed, you can install and activate a WordPress Redis plugin, such as Redis Object Cache. Our Managed Hosting service comes with Redis ready to use.
The plugin connects your WordPress site to the Redis server. Once connected, WordPress can then start
By effectively using Redis, you can significantly speed up your WordPress website, provide a smoother user experience, and reduce the load on your server. However, it is worth noting that, like any other technology, it should be used and configured correctly to get the most out of it. If you are unfamiliar with configuring Redis, you may want to consult with a professional or managed hosting provider to help set it up correctly.