I am also dealing with a site on luthor.
The load on that server is tremendously high and has been that way for the majority of the past 3 days. At the moment the load is above 360. It hasn't dropped below 150 since I've been watching it today, generally it has stayed above 250. (IMHO good load on a server should be in the range of 2 to 5, for reference. So we're talking well in excess of 100x acceptable load.)
I encourage you to open a support ticket and complain. I've been doing so, but apparently to no avail, even though I have been assured multiple times that Dreamhost are taking the necessary steps to rectify this situation.