Réparation du path mysql.socket

Bonjour,

Je n'ai plus de webmaster depuis quelques mois.
Aujou'dhui après un démarrage du serveur alors que les index magento étaient en train de rafraichir, j'ai le message d'erreur qui m'affiche sur la page :
SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

Trace:
#0 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(54373): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(54846): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(53060): Varien_Db_Adapter_Pdo_Mysql->_connect()
#3 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(54116): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#4 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(54952): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#5 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(29688): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#6 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(29629): Mage_Core_Model_Resource->_newConnection('pdo_mysql', Object(Mage_Core_Model_Config_Element))
#7 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(13227): Mage_Core_Model_Resource->getConnection('core_write')
#8 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(13257): Mage_Core_Model_Resource_Db_Abstract->_getConnection('write')
#9 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(13242): Mage_Core_Model_Resource_Db_Abstract->_getWriteAdapter()
#10 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(13267): Mage_Core_Model_Resource_Db_Abstract->_getReadAdapter()
#11 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(31718): Mage_Core_Model_Resource_Db_Abstract->getReadConnection()
#12 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(23823): Mage_Core_Model_Resource_Db_Collection_Abstract->__construct(Object(Mage_Core_Model_Resource_Website))
#13 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(23855): Mage_Core_Model_Config->getModelInstance('core_resource/w...', Object(Mage_Core_Model_Resource_Website))
#14 /var/www/vhosts/gugustar.com/httpdocs/app/Mage.php(490): Mage_Core_Model_Config->getResourceModelInstance('core/website_co...', Object(Mage_Core_Model_Resource_Website))
#15 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(7044): Mage::getResourceModel('core/website_co...', Object(Mage_Core_Model_Resource_Website))
#16 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(7049): Mage_Core_Model_Abstract->getResourceCollection()
#17 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(20701): Mage_Core_Model_Abstract->getCollection()
#18 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(20559): Mage_Core_Model_App->_initStores()
#19 /var/www/vhosts/gugustar.com/httpdocs/includes/src/__default.php(20442): Mage_Core_Model_App->_initCurrentStore('', 'store')
#20 /var/www/vhosts/gugustar.com/httpdocs/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#21 /var/www/vhosts/gugustar.com/httpdocs/index.php(97): Mage::run('')
#22 {main}

Malgré recherches sur internet. Je n'arrive pas à solutionner ce probleme.
Pouvez-vous me venir en aide. Si, oui faire un devis.

Merci

Lin Billy