On 1/29/20 4:44 AM, Bob Polmanter wrote:
If you are a single user VM/370 system, running 16MB real, even if you had a 16MB user virtual machine, you would have to go some to cause much paging beyond a very light amount.? If you had several 16MB user machines running simultaneously with large active working sets, then maybe you could get the paging rate up to 5-10 pages per second.? With Hercules caching, it just isn't a problem.
Note the while VM/370 supports 16M of real memory, only the largest machines had that much installed.?? For example, the S/370 158 only supported 4M, and the uniprocessor 168 only supported 8M.?? You would have needed (and paid for) an MP S/368 or a 3033 to get a full 16M.
So lighted loaded Hercules machines with 16M of real (for a sufficiently emulated definition of real) memory aren't likely to go to memory bound when running VM/370 era software.
-ahd-
