Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
/home/xx/public_html/includes/class_core.php on line 311
MySQL Error : 
Error Number : 
Request Date : Sunday, November 2nd 2008 @ 01:58:30 PM
Error Date : Sunday, November 2nd 2008 @ 02:03:51 PM
Script : [URL="http://xx"]xx[/URL]
Referrer : 
IP Address : 72.30.81.181
Username : 
Classname : vB_Database
MySQL Version :

gibi 40 tane mail geldi. Daha öncede geliyordu çözüm bulamadım ama mysql'a aşırı yüklememi yapıyor nedir. Bu sorunu nasıl çözebilirim?
Daha önceki sorun,

Database error in vBulletin :
mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Too many connections
/home/xx/public_html/includes/class_core.php on line 311
MySQL Error : 
Error Number : 
Request Date : Sunday, October 19th 2008 @ 12:05:26 PM
Error Date : Sunday, October 19th 2008 @ 12:05:26 PM
Script : 
Referrer : 
IP Address : 78.175.224.28
Username : 
Classname : vB_Database
MySQL Version :

bu şekildeydi. Bunun çözümü nedir? bilen varmı