"It was our first week using iSight and I ran a report showing all queries that returned more than 5,000 rows, thinking it was a good place to start. At the top of the list were two queries that each returned 13 million rows and ran for more than sixteen hours! When I drilled down to the detail report, I discovered the problem—the queries were identical Cartesian joins issued by the same user, the first issued around 9:00 am and the second after lunch."