Book description
This IBM® Redbooks® publication gives a broad understanding of several important concepts that are used when describing IBM CICS® Transaction Server (TS) for IBM z/OS® (CICS TS) performance. This publication also describes many of the significant performance improvements that can be realized by upgrading your environment to the most recent release of CICS TS.
This IBM Redbooks publication targets the following
audience:
Systems Architects wanting to understand the performance
characteristics and capabilities of a specific CICS TS
release.
Capacity Planners and Performance Analysts wanting to understand
how an upgrade to the latest release of CICS TS affects their
environment.
Application Developers wanting to design and code highly
optimized applications for deployment into a CICS TS
environment.
This publication covers the following topics:
A description of the factors that are involved in the
interaction between IBM z Systems™ hardware and a z/OS
software environment.
A definition of key terminology that is used when describing the
results of CICS TS performance benchmarks.
A presentation of how to collect the required data (and the
methodology used) when applying Large Scale Performance Reference
(LSPR) capacity information to a CICS workload in your
environment.
An outline of the techniques that are applied by the CICS TS
performance team to achieve consistent and accurate performance
benchmark results.
High-level descriptions of several key workloads that are used
to determine the performance characteristics of a CICS TS
release.
An introduction to the open transaction environment and task
control block (TCB) management logic in CICS TS, including a
reference that describes how several configuration attributes
combine to affect the behavior of the CICS TS dispatcher.
Detailed information that relates to changes in performance
characteristics between successive CICS TS releases, covering
comparisons that relate to CICS TS V4.2, V5.1, V5.2, and
V5.3.
The results of several small performance studies to determine
the cost of using a specific CICS functional area.
Table of contents
- Front cover
- Notices
- IBM Redbooks promotions
- Preface
- Part 1 CICS TS for z/OS performance concepts
- Chapter 1. Performance terminology
- Chapter 2. Test methodology
- Chapter 3. Workload descriptions
- Chapter 4. Open transaction environment
- Part 2 CICS TS performance information
-
Chapter 5. CICS TS for z/OS V5.1
- 5.1 Introduction
- 5.2 Release-to-release comparisons
- 5.3 Improvements in threadsafety
-
5.4 Changes to system initialization parameters
- 5.4.1 Active keypoint frequency (AKPFREQ)
- 5.4.2 Extended dynamic storage area limit (EDSALIM)
- 5.4.3 Terminal scan delay (ICVTSD)
- 5.4.4 Maximum open TCBs (MAXOPENTCBS)
- 5.4.5 Maximum XP TCBs (MAXXPTCBS)
- 5.4.6 Maximum tasks (MXT)
- 5.4.7 Priority aging interval (PRTYAGE)
- 5.4.8 Location of terminal user areas (TCTUALOC)
-
5.5 Enhanced instrumentation
- 5.5.1 DFHCHNL performance group
- 5.5.2 DFHCICS performance group
- 5.5.3 DFHDEST performance group
- 5.5.4 DFHFILE performance group
- 5.5.5 DFHRMI performance group
- 5.5.6 DFHSOCK performance group
- 5.5.7 DFHSTOR performance group
- 5.5.8 DFHTASK performance group
- 5.5.9 DFHTERM performance group
- 5.5.10 Monitoring domain global statistics
- 5.5.11 Loader domain global statistics
- 5.6 Virtual storage constraint relief
- 5.7 64-bit application support
- 5.8 Java 7 and zEnterprise EC12
- 5.9 CICSPlex System Manager dynamic routing
- 5.10 Workload consolidation
- 5.11 Effect of threadsafe transient data
- 5.12 Transaction isolation
-
Chapter 6. CICS TS for z/OS V5.2
- 6.1 Introduction
- 6.2 Release-to-release comparisons
- 6.3 Improvements in threadsafe API and SPI commands
- 6.4 Changes to system initialization parameters
- 6.5 Enhanced instrumentation
- 6.6 Kerberos
- 6.7 JSON support
- 6.8 Java applications and trace
- 6.9 Web service over HTTP improvements
- 6.10 Java 7.0 and Java 7.1
-
Chapter 7. CICS TS for z/OS V5.3
- 7.1 Introduction
- 7.2 Release-to-release comparisons
- 7.3 Improvements in threadsafety
- 7.4 Changes to system initialization parameters
- 7.5 Enhanced instrumentation
- 7.6 Low-level CICS optimizations
- 7.7 Web support and web service optimization
- 7.8 Java workloads
- 7.9 Java 8 performance
- 7.10 Simultaneous multithreading with Java workloads
- 7.11 Reporting of CPU time to z/OS Workload Manager
-
7.12 z/OS Connect for CICS
- 7.12.1 CICS TS V5.3 performance enhancement
- 7.12.2 Varying payload sizes by using Java parser
- 7.12.3 Comparing Java and native parsers
- 7.12.4 Comparing Java and native parsers with varying request sizes
- 7.12.5 Comparing Java and native parsers with varying response sizes
- 7.12.6 Native parser conclusion
- 7.13 HTTP flow control
- 7.14 High transaction rate performance study
- Related publications
- Back cover
Product information
- Title: IBM CICS Performance Series: CICS TS for z/OS V5 Performance Report
- Author(s):
- Release date: April 2016
- Publisher(s): IBM Redbooks
- ISBN: 9780738441627
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