---
title: Configure Redis Object Cache for WordPress
description: "An object cache keeps the results of repeated database queries in memory so WordPress does less work per page. Redis is a fast, widely used backend for it. This guide sets Redis up safely on a single server. ## What…"
url: "https://apatecreative.com/knowledge-base/redis/configure-redis-object-cache-for-wordpress/"
updated: "2026-10-11"
category: Redis
---

# Configure Redis Object Cache for WordPress

An object cache keeps the results of repeated database queries in memory so WordPress does less work per page. Redis is a fast, widely used backend for it. This guide sets Redis up safely on a single server.

## What does a Redis object cache do for WordPress?

It stores query results and computed values in RAM, so repeat requests skip the database. Logged-in pages, admin screens, and dynamic content benefit most because full-page caches cannot serve them. Expect fewer database queries and lower response times on busy sites.

## Step 1: Install and secure Redis

```
sudo apt install -y redis-server
sudo nano /etc/redis/redis.conf
```

```
# /etc/redis/redis.conf
bind 127.0.0.1 -::1
protected-mode yes
maxmemory 256mb
maxmemory-policy allkeys-lru
supervised systemd
```

## Step 2: Restart and test

```
sudo systemctl restart redis-server
redis-cli ping   # expect: PONG
```

## Step 3: Connect WordPress

Add the connection constants to `wp-config.php` above the line that says to stop editing, then enable your object-cache plugin.

```
define( 'WP_REDIS_HOST', '127.0.0.1' );
define( 'WP_REDIS_PORT', 6379 );
define( 'WP_CACHE_KEY_SALT', 'example.com:' );
```

## Check that it is working

1. Load a few pages while logged out and logged in.
2. Run `redis-cli info stats` and compare `keyspace_hits` with `keyspace_misses`.
3. A healthy site shows hits far above misses after the cache warms up.