What does this MySQL error mean?

[COOLORANGEFREEZE]

Thanks, Trevster! Much appreciated! I will contact my host if this continues.

[Trevor Hannant]

It means that the connection to your database was lost temporarily.

If you continue to get this, contact your host to advise them

[COOLORANGEFREEZE]

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/neighbq7/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Tuesday, November 24th 2009 @ 03:52:38 AM
Error Date : Tuesday, November 24th 2009 @ 03:52:38 AM
Script : http://www.neighboraide.com/forum/fo...play.php?f=187
Referrer :
IP Address : 67.195.110.163
Username :
Classname : vB_Database
MySQL Version :



I got that in my email. I don't know what it means and I've never gotten one of these before.