What is Redis?

By default, OpenCart uses MySQL database or native (files) session storage
It works great, but it is a bit slow.

Redis is perfect for storing sessions.
All operations are performed in memory, and so reads and write will be fast.

Redis is a highly efficient distributed data storage. High operation speed is guaranteed by data storage in RAM, being regularly saved on a disk, after equal periods or when reaching a certain number of queries

How to setup redis session driver

In the OpenCart admin backend, do the following steps:
Install via Extensions > Marketplace or via Extensions > Installer > Upload

Then you need to define a few constants in
config.php
admin/config.php

Default config
// Redis
define('CACHE_HOSTNAME', '127.0.0.1');
define('CACHE_PORT', '6379');
define('CACHE_PREFIX', 'redis_');
define('CACHE_PASSWORD', '');


Config for Unix socket
// Redis
define('CACHE_HOSTNAME', '/tmp/redis.sock');
define('CACHE_PORT', '0');
define('CACHE_PREFIX', 'redis_');
define('CACHE_PASSWORD', '');


OpenCart 3.x

system->config->default.php
system->config->catalog.php

change the value from
$_['session_engine'] = 'db';
to
$_['session_engine'] = 'redis';

OpenCart 2.x

system/framework.php

change the value from
$session = new Session();

to
$session = new Session('redis');

Free installation service
If you need help with installation just press the "Get support" button and we will do it for you.