database error - Too Many Connections

[riderbook]

we are getting database error and here is the source copy:

<!--
Database error in vBulletin :

mysql_connect() [&lt;a href='function.mysql-connect'&gt;function.mysql-connect&lt;/a&gt;]: Too many connections
/home/realy/public_html/forum/includes/class_core.php on line 311

MySQL Error   : 
Error Number  : 
Request Date  : Saturday, February 12th 2011 @ 12:21:11 AM
Error Date    : Saturday, February 12th 2011 @ 12:21:11 AM
Script        : http://www.forum.com/forum/
Referrer      : http://www.forum.com/forum/private.php
IP Address    : x.x.x.x
Username      : 
Classname     : vB_Database
MySQL Version : 
-->

please help with me, what should be done now ? Earlier we had only mysql connection drop but never this too many connections error.
We are on a VPS with root access

[Steve Machol]

The server has maxed out the number of MySQL connections it allows. This is a server-wide limit, not just your forums. Unless you have root access to the server all you can do is ask your host to raise the maximum number of connections they allow.

Here is more info on that error:

http://dev.mysql.com/doc/refman/5.0/en/too-many-connections.html