Diagnosis
You switched off the automatic saving of database logs.

System Response
Automatic saving of database logs will no longer be performed. Thisalso means that you have to watch the size used for unsaved logs andplan the log saving actions explicitly.

Procedure
Watch your database log activity carefully. If there is no more spaceleft to write logging information the database stops working and youhave to save the logs immediately by yourself. Also note that it ishighly recommended to save the database logs regularly.