The mainframe scheduler is fantastic. z/OS has the capability of limiting the resource usages in different dimensions, including memory use. You can give priori

The mainframe scheduler is fantastic. z/OS has the capability of limiting the resource usages in different dimensions, including memory use. You can give priorities to processes, which means that you can define what is business critical and what is not. If the workload goes too high for the machine, then low priority work just waits. In any case, I'd advise anyone who can have a try at mainframe to give a look, even if just because it's one of the still used non-Unix based systems.