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IBM Db2 12 for z/OS Performance Topics

An IBM Redbooks publication

I know many of you have been waiting for this Redbook so the wait is over, this is a very valuable book written by some of the top experts in the industry. Download your copy today and find out how Db2 12 delivers significant business value and helps reduce costs, improves scalability which is critical in today's IT environment when DATA is exploding. Also find out how the improvements in application enablement enable organisations to meet their business objectives around cloud and mobile.

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Authors: Akiko Hoshikawa, Bart Steegmans, Cristian Molaro, Kaitlin E. Murray

Abstract

Db2 12 for IBM z/OS® delivers several significant business values, such as cost reductions, scalability improvement, and improved application enablement for cloud and mobile environment.

Db2 12 also introduces a foundation of continuous delivery. In continuous delivery, new capabilities and enhancements, including performance features, are delivered through function levels without waiting for a new release.

Function levels 100 and 500 activate the initial set of enhancements and capabilities in Db2 12. For migration from Db2 11, most new capabilities become available in Db2 12 only after the activation of function level 500 or higher. In this IBM® Redbooks® publication, we focus on the enhancements that are available in function levels 100 and 500.

Db2 12 for z/OS continues the trend by focusing on further CPU savings and performance improvement through innovations within Db2 and the synergy with IBM System z® hardware and software. While most of CPU reductions in analytical queries are built directly in Db2, other CPU and cost reductions are realized by using more real memory. Enhancements often take effect after the REBIND in the case of static applications, while some enhancements require user actions, such as activating function level, Data Definition Language (DDL) updates, or providing more memory for Db2 to use.

In this book, we describe the performance of Db2 12 for z/OS and the possible performance affects of the most important functions when migrating from Db2 11. We include performance measurements that were made in the Silicon Valley Laboratory and provide considerations and high-level estimates. Results are likely to vary because the conditions and work differ.

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