Caching with Memcache(d)

Memcache can have a massive performance increase on small stores with lots of memory.

It's a trade off between taking up less space or eating up more CPU cycles.

Be sure to check your phpinfo() has 'Memcahe' enabled before making this change.

Opencart 2.3 simple edit: system/config/default.php

$_['cache_type']           = 'file'; // apc, file, mem or memcached
$_['cache_expire']         = 3600;

To use Opencart with PHP7.0 you will need to make changed to Memcache to Memcached

Upload below class to: system/library/cache/memcached.php
Then set the above cache_type to 'memecached'. Also recommend adding a way of clearing the cache manually especially if you're using non file stored cache.

1. Older version than 2.3  require small changes.
   
2. Add below code to: config.php AND admin/config.php
   
   

   // Cache
   define('CACHE_DRIVER', 'mem'); // 'file', 'apc', 'mem' or 'memcached'
   define('CACHE_HOSTNAME', 'localhost');
   define('CACHE_PORT', '11211');
   define('CACHE_PREFIX', 'oc_');
   

   
   
3. Edit index.php  AND admin/index.php
   
   Replace

   $cache = new Cache('file');

   
   With

   $cache = new Cache(CACHE_DRIVER);

   
   

You will get this error if you are missing these from your configs

Use of undefined constant CACHE_HOSTNAME

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