settings_extra.php

<?
return array (

    'cache' => array(
'value' => array(
'type' => 'memcache',
'memcache' => array(
'host' => 'unix:///var/run/memcached/memcached.sock',
'port' => '0',
),
'sid' => $_SERVER["DOCUMENT_ROOT"] . "#01"
),
'readonly' => false,
),
);