Benefits of Configuring More Memory in the IBM z/OS Software Stack
Mark Wisniewski, Brenda Beane, David Betten, Clark Goodrich, Akiko Hoshikawa, David Herr, Catherine Moxey, Tony Sharkey, Pete Siddall, Robin Tanenbaum, Elpida Tzortzatos, David L Zhang, IBM Redbooks
IBM Redbooks, Feb 18, 2017 - Computers - 60 pages
Significant performance benefits can be realized by increasing the amount of memory that is assigned to various functions in the IBM® z/OS® software stack, operating system, and middleware products. IBM DB2® and IBM MQ buffer pools, dump services, and large page usage are just a few of the functions whose ease of use and performance can be improved when more memory is made available to them.
Although the magnitude of these improvements can vary widely based on several factors, including potential I/Os to be eliminated, resource contention, workload, configuration, and tuning, clients must carefully consider whether their environment can benefit from the addition of memory to the software functions that are described in this IBM RedpaperTM publication.
This paper describes the performance implications of increasing memory in the following areas: