Reorder processing

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z/VM® triggers from time to time a processing to reorder the pages for all its virtual systems.

While the page reorder processing runs, the virtual system is stopped. This behaviour is not wanted when running a benchmark application over a longer period, because it affects the results of the benchmark application.

It is possible to disable the page reorder processing with the SET REORDER command for the entire z/VM operating system. In some situations it makes sense to disable page reorder processing aside from benchmarking.

For more information, see the IBM® z/VM documentation about Disabling the guest page reordering process:
https://www.ibm.com/docs/en/zvm/7.2?topic=operation-61-disabling-guest-page-reordering-process

System Overview > z/VM V6R2 General Information > What is new or changed in z/VM 6.2 > Scalability > Disabling the guest page reordering process

For details about the reorder processing, see:
http://www.vm.ibm.com/perf/tips/reorder.html