z/VM 6.3 Resource Overcommitment

This paper provides information about the performance of virtualized environments when operated with constrained resources. A z/VM based system installation runs a set of virtual systems of different types of workloads under Linux on System z. Another aspect analyzed was the efficiency of the z/VM paging subsystem when using EDEV-SCSI based paging devices, as opposed to ECKD based paging devices. It highlights the behavior of the new memory and CPU management introduced with z/VM 6.3.

Published November 2014