vBulletin Database Error!

[محروم.كوم]

I received about 15 messages like this in a short span of 10 minutes.
I dont understand what is going on.
I have not upgraded any software or not installed any new hacks recently.
Please help me to understand this issue. What is in line 311 ?

Quote:

Database error in vBulletin :

mysql_connect() [function.mysql-connect]: Too many connections
/home/xxx/public_html/forums/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Monday, August 17th 2009 @ 1205 PM

Error Date : Monday, August 17th 2009 @ 1206 PM
Script : http://www.r2iclubforums.com/forums/...ad.php?t=10496
Referrer : http://www.r2iclubforums.com/
IP Address : 47.102.244.209
Username :
Classname : vB_Database
MySQL Version : __DEFINE_LIKE_SHARE__