Database Exception

SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
#0 /home/admin/web/apartila.com/public_html/library/Zend/Db/Adapter/Pdo/Mysql.php(109): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /home/admin/web/apartila.com/public_html/library/Zend/Db/Adapter/Abstract.php(459): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /home/admin/web/apartila.com/public_html/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#3 /home/admin/web/apartila.com/public_html/index.php(121): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8')
#4 {main}