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Performance Considerations When Moving to Fewer Faster CPUs

Document Author:

Kathy Walsh

Document ID:


Doc. Organization:

Advanced Technical Sales

Document Revised:


Product(s) covered:

Performance; Performance

Abstract: Current processor design continues to deliver more CPU capacity with the same or fewer number of central processors (CPs). This environment results in some customers running their workloads on configurations with fewer CPs.

While this migration can be very successful with workloads enjoying equal or better performance after the move, there are some planning and tuning issues to consider. This paper will discuss the issues involved with reducing the number of processors and will provide guidelines to ensure a successful migration. The information presented is the result of tuning experience at the IBM Washington Systems Center as well as the results of several tests run in a controlled environment.

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Hardware; Software




IBM System z Family




LPAR , Fewer Faster CPs, 414910

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