Redis Cache By Xon

Redis Cache By Xon 2.11.5

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Compatible XF 2.x versions
  1. 2.1
  2. 2.2
Additional requirements
php 7.0+
Redis (v3.0.0 or better)
phpredis (for performance)
MIT Licence (add-on), New BSD (Redis Zend component)
Visible branding
This add-on uses Credis with a custom cache provider for Redis (based off Cm_Cache_Backend_Redis). For best performance, install the php extension: phpredis

You must have a Redis instance installed, this is likely not possible with shared hosting

While XenForo 2 has a redis connector, it requires phpredis. This add-on does not.

Feature overview
  • A pure php redis connector
  • High availability support
  • Exposes redis cache object for use for use by other add-ons
  • Implements some minor caching of forum thread counts
  • Redirect's XenForo's individual css template caching to hit redis as otherwise it causes unexpected write & deadlocking on the xf_css_cache table

Please be aware that Redis is very sensitive to latency in a virtual environment. If repeated connection failures or protocol errors are experienced disable any Redis Persistence options.

By default, forum thread counts are cached. In general, this is observable when moving large number of threads from one forum to another, and the total page counts are wrong.


Redis Statistics
Admincp dash board is extended with basic redis statistics:


Read Scaling

With the $config['cache']['config']['load_from_slave'] option, reads can be deferred to a singular slave instance. This takes all the options of 'config' (except the slave config)

See the FAQ for configuration samples.

High availability

The Zend component support master/slave setups with Redis Sentinel support. It does not support Redis multi-master clustering.
  • Additionally, this add-on implement caching of thread counts in a forum.
  • Redis Sentinel support for high-availability (see FAQ for details).

Components licenced under; New BSD
  • Credis
Components licenced under; MIT Licence
  • XenForo Add-on code
Contributing features or bug fixes
Please create a GitHub Pull request via the "More Information" link.


If you appreciate this add-on, please consider a contribution via PayPal. Details will be provide via private conversation.

Please contact me if you wish for different licencing arrangements.
Related resources
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First release
Last update
5.00 star(s) 9 ratings

More resources from Xon

Latest updates

  1. 2.11.5 - Bugfix update

    Fix "CredisException: ERR syntax error ", when a non-integer is passed to...
  2. 2.11.4 - php compatibility update

    Initial php 8.2 compatibility update
  3. 2.11.3 - Bugfix & minor feature update.

    Fix "Short Thread Count Expiry time" and "Thread Count Expiry time" options where swapped...

Latest reviews

Awesome tool, everything incorporates into the admin panel nicely as well. A must have add-on for those running Redis.
Great addon, thank you for providing this solution to improve the performance of our websites. Maybe in the future you can think of a way to integrate in this addon a Redis Cache force purge option/button.
I've used this for over a year on a large forum with over 20 million posts. It's been working with no problems. Honestly my benchmarking isn't good enough to exactly how much this improved things, but it didn't break anything either.
Same addition as this Also, if the developer would look towards the predis or phpreact library, where there is completely asynchronous caching. It would be much more interesting to watch this. This supplement is what is missing from the box and should be required. Specifically, in the current version, the set of features is very scarce.
We've been dealing with some serious server load issues since upgrading from XF 1.5 to XF 2.1. Out of ideas, we decided to give this a shot. I'm not exaggerating when I say our CPU usage went from near 50% to the 20's. If you're not running this, you should be.
Forum back again to turbo speed with this addon on my large forum with these stats:
A must have!
Xon has some of the most useful addons and this is one of them. He also has unrivaled support. Literally fixing bugs within a day.
As long as you meet the Redis pre req. its changes the already fast instance of Xenforo2.1 to lightening quick. It really is like greased lightening with this addon. Thanks very much for your work -
After installing this, the board with 6M posts acted like it was a brandy-new install!

Installation was a breeze and so was config.