<"z/OS handles many address spaces very well." >It's far less wonderful at handling them (at least in our experience) when >the machine is busy. >And ours is. "Buy more MIPS" isn't going to fly, so we're looking for >something creative.
>I'm not sure why limiting the instances to the number of CPs makes any >sense. >Perhaps if this were the ~only~ thing running. What am I missing? I agree that limiting the number of dispatchable units of work (TCB's) to the number of CPs is not particularly useful. Of course your queueing techniques will affect the decision as to how to dispatch your tasks. My comment about z/OS dispatching address spaces very well is a general one and not to be taken as meaning "always". Your experience in this matter is the one that counts. Certainly "Buy more MIPS" isn't a viable option. What we're trying to do is decrease the MSU usage and allocate it to where this usage is doing business related work. Andy Coburn
