Monday, April 30, 2012 6:59 AM
We are facing the identical issues - SharePoint_Config log is growing every Sunday 5:00 AM. Search Job was overalpping with Delete Job History; but changing its time didn't help and log is still growing.
Pls note in my case .mdf size is 1.12 GB; while log files reaches to 3.5 GB and the Database is set to simple recovery model.
Tuesday, May 01, 2012 8:27 PM
Could you check to see if you have verbose logging on?
You might want to turn it off and check.
Although you can turn on/off verbose logging from CA you might want to try using stsadm commands from powershell.
Here are two links to get you started:
Tuesday, May 01, 2012 9:22 PM
Is there any reason why you are not operating the config database in simple mode? It is a SharePoint recommendation
Please mark my response as an answer if appropriate.