Configuring OPcache, Redis, and Memcached

The default caching mechanism of Magento is based on file caching. All the cache files are written to the var/cache folder. For a simple webshop, this is enough, but if you are scaling your shop with many products and high traffic, you will need to use some extra caching systems.

Redis is a replacement of the standard file caching of Magento. This system works faster when you have a lot of cache files.

Memcached is similar to Redis. It is a system in which you can cache objects.

Zend OPcache is an opcode caching system. When these caching techniques are enabled, the PHP code will be cached to these systems.

Getting ready

When we want to configure the caching tools Zend OPcache, Memcached, and Redis, we have to install them on our server. To install these, run the commands explained in the following topics:

Zend OPcache

This package is normally standard installed with PHP 5.5. When you execute a phpinfo() method or run the php -i | grep opcache command...