# Redis object caching
Source: https://docs.webgee.com/en/wordpress-cloud/redis-object-cache





Redis caches the results of database queries in memory, so repeated queries do
not hit MariaDB. On a busy WordPress site — particularly WooCommerce — it is the
single most effective change available here. Applies to all WordPress Cloud
packages.

Each website gets its own Redis daemon inside its own PHP container. It is not
shared with anyone else.

## Enable it [#enable-it]

Go to **Advanced** → **Developer tools** → **Redis** and turn the toggle on.

<img alt="The Redis panel enabled, showing the connection details" src="__img0" />

The connection details appear immediately:

| Setting       | Value            |
| ------------- | ---------------- |
| Host and port | `127.0.0.1:6379` |
| Password      | None by default  |

Redis listens only on the loopback address inside your container, so it is not
reachable from outside and needs no password to be safe. If you want one anyway,
set it in `redis.conf`.

## Connect WordPress to it [#connect-wordpress-to-it]

WordPress does not use Redis on its own. Install an object cache plugin —
**Redis Object Cache** is the usual choice — and enable it. With the defaults
above it will find the server without any configuration.

Confirm it is working from the plugin's status page, which should report a live
connection rather than "Not connected".

## Configuration and logs [#configuration-and-logs]

Redis starts from `redis.conf` in the website's home directory and logs to
`redis.log` beside it. Both are visible in the
[file manager](/en/wordpress-cloud/files-and-ftp).

**Edit redis.conf** opens the file from the Redis panel. Restart the PHP
container from **Developer tools** → **PHP** → **Restart** for changes to apply.

<Callout type="warn">
  Redis holds the cache in memory, and that memory counts against your
  container. If you set `maxmemory` too high in `redis.conf`, PHP itself can be
  starved. Leave it at the default unless you are measuring the effect.
</Callout>

## When it does not help [#when-it-does-not-help]

Redis caches database queries. It does nothing for slow PHP, slow external API
calls or unoptimised images. If a page is slow with an empty cache and slow with
a warm one, the problem is elsewhere.

## Related [#related]

* [PHP versions and settings](/en/wordpress-cloud/php-settings)
* [Databases and phpMyAdmin](/en/wordpress-cloud/databases)