Database Error Number 2006

Hello, I'm getting this error every few days

Code:

Database error in vBulletin 3.8.4:

Invalid SQL:

INSERT INTO vb_cronlog
(varname, dateline, description, type)
VALUES
('vbseo_sitemap_task',
1252964389,
'Google Sitemap Created',
0);

MySQL Error   : MySQL server has gone away
Error Number  : 2006
Request Date  : Tuesday, September 15th 2009 @ 12:39:49 AM
Error Date    : Tuesday, September 15th 2009 @ 12:40:35 AM
Script        : http://www.supa.gr/forums/cron.php?rand=1252964384
Referrer      : http://www.supa.gr/forums/f46/
IP Address    : 79.103.94.107
Username      : No register
Classname     : vB_Database
MySQL Version :

Hello ,

You need to increase mysql wait_timeout to a value range between 170-190 and restart mysql

ok.
i will try. thank you

You're welcome