A lot of folks have complained about the Service Manager 2012 console consuming huge amounts of memory. This issue has been reproduced by Microsoft and for now, a private fix is available. To get the private fix you’ll need to open a support case.
A proper fix will be included in Update Rollup 3 which will be coming out in October 2012.

Brandon Ryan: Try Alt+Home to see if that brings up the start menu....
Paul Thomsen: I love RDCM too. A little unreliable when I have around 10 sessions or...
Trevor Sullivan: One of the main reasons I avoid using Active Directory site boundaries...
Daniel Ratliff: I LOVE RDCM. I used to use VisionApp and a few others but RDCM is free...
DC: I look forward to hearing Brad at TechEd 2013...