Yesterday, we were running a test using 17 z/TPF virtual machines, 3GB each. This was in addition to the normal load on the system. During the test, which was not moving along very quickly, nothing was, I noticed that our page packs were 100% allocated, up from the usual 10%. This stood out as a smoking gun, verified by watching the performance improve as each of the ids in the test logged off. I presume that this should have been expected; however, other matters have kept us so busy that we did not do the math. I imagine that the one way to avoid this type of problem, we expect a peak of approximately 150 concurrent z/TPF systems in the coming year, is a massive injection of paging DASD. Is this the only answer or are there any other steps that we can take to help?
Regards, Richard Schuh
