Published on 21 January 2017, updated 18 February 2017
IBM Form #: REDP-5238-01
Authors: Mark Wisniewski, Brenda Beane, David Betten, Clark Goodrich, Akiko Hoshikawa, David Herr, Catherine Moxey, Tony Sharkey, Pete Siddall, Robin Tanenbaum, Elpida Tzortzatos and David L Zhang
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.
The following benefits can realized:
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 Redpaper™ publication.
This paper describes the performance implications of increasing memory in the following areas:
Chapter 1. Introduction
Chapter 2. DB2 buffer pools and related tuning
Chapter 3. Java and large memory
Chapter 4. IBM MQ and CICS
Chapter 5. New applications and analytics
Chapter 6. Other benefits
Chapter 7. Conclusion