C.2.1. Maximum number of concurrent GUI sessions
Multiple GUI sessions for different users can be run at the same time on the same machine. The maximum number of concurrent GUI sessions is limited by the hardware, especially by the memory size, and by the workload demands of the running applications. For common PCs the maximum possible number of concurrent GUI sessions is not higher than 10 to 15, depending on previously described circumstances. Logging the same user into GNOME more than once on the same machine is not supported, because some applications could terminate unexpectedly.