Started the upgrade 08:10 and the upgrade was finished 9:37. I have only about 10 host in OME. I takes long time just wait. Do not forget to delete the snapshot after the upgrade is finnished.
The CPU was like this during the time.
The screen that was there for a long time was this:
And here is the different jobs that was going on under the upgrade. The first job in the list (last if you look at the time) I started manually!