We have an Amazon EC2 instance which is firing off a High CPU alert once a day. It happens at exactly the same time every single day.
In looking at the cpu utilization history I see one spike that occurs at either 6:09, 6:14, 6:19 or 6:24 each day - only 1, but over the past 2 weeks that spike has rotated through those moments.
A second spike occurs at 8:59; this second one causes the alarm and is ALWAYS at 8:59.
How can I figure out what's going on?
The server is a web server running a .net application. There are no services installed other than what comes with Windows. There are no jobs firing from other parts of the system that hit this machine.