SugarCRM is configured by default to use external cache and if the external cache storage is not available, it will produce a warning or error.
The specific cache handlers can be disabled with the following lines:
‘external_cache_disabled_apc’ => ‘true’, //if set to true will disable apc external cache.
‘external_cache_disabled_memcache’ => ‘true’, //if set to true will disable memcache external cache
‘external_cache_disabled_zend’ => true, //if set to true will disable zend external cache
To disable the caching completely, use the following line:
‘external_cache_disabled’ => ‘true’,
The lines should be placed in the beginning of the SugarCRM’s configuration file – config.php.