Monday my developer came to me and said that uploading infopath forms was very slow. I went through my logs and noticed my daily backup's were taking far longer than usual.
I've found 2 errors in the event log. They are errors 5555 and 7888. Both seem to be related and point to a database issue. I went back through the logs and they were happening in December. So the server was fine for months with these errors popping up every hour.