I am geting these errors about 10 times a day. It looks like it is only affecting the Alerting engine. When I get this in the event log the alerting engine goes out to lunch, and no new alerts are created.
Service was unable to open new database connection when requested.
Exception Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.