Cursusbeschrijving: Basic z/OS Tuning using the Workload Manager (WLM)

Do you need to know how to establish a practical performance management program for your z/OS system? This course is designed for new performance analysts to learn to work with the Workload Manager (WLM) in goal mode. Learn concepts of WLM and performance management in the z/OS system using the WLM.

Learn how to analyze Resource Monitoring Facility (RMF) reports and implement service definitions via the WLM Interactive System Productivity Facility (ISPF) application. The course uses z/OS hands-on lab exercises to reinforce the concepts and techniques discussed in lecture.

Hands-on Labs:

This course includes hands-on lab exercises. Each student team, working on their own z/OS system, will configure RMF, analyze RMF reports to find bottlenecks, and utilize the WLM dialogs to create goals and classification rules in a Service Definition that manages a supplied z/OS workload.

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Roadmaps:

• z/OS Installation, Tuning, JES, and REXX Programming and Problem Diagnosis
• z/OS Installation, Tuning, JES, and REXX Programming and Problem Diagnosis

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This is an intermediate course for z/OS system programmers, z/OS performance analysts, and z/OS performance administrators new to performance management for their z/OS system.

Note: ES54 is intended for individuals new to WLM and the z/OS performance area.

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You should

• Understand basic MVS / z/OS operation, such as job flow through JES, job scheduling paging, swapping, dispatching controls, I/O scheduling.
• Have a basic knowledge of the purpose of the Workload Manager's function in managing system workloads.
• Be familiar with using TSO and ISPF to manage data sets and run batch jobs
• Knowledge of z/OS at the level provided in z/OS Facilities (ES15) and z/OS System Services Structure (ES20), together with some practical experience as Systems Programmer is required

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• Describe a performance and tuning methodology
• Develop a systematic z/OS performance and tuning plan
• Describe the factors which could affect the performance of an z/OS system
• Use the WLM ISPF application
• Describe the components of a service definition
• Define workloads and service levels and classification rules
• State which z/OS commands affect WLM operation
• Identify the major WLM services for z/OS, including enclaves and application environments, and how they are used by DB2, WebSphere and CICS
• Analyze CPU performance when running in a shared LPAR environment
• Utilize and monitor zIIP and zAAP specialty engines
• Measure and tune z/OS DASD, processor storage, and coupling facility configurations
• Explain the functions and facilities of RMF and SMF
• Analyze performance bottlenecks using RMF
• Use Workload License Charges (WLC), defined capacity and soft capping to manage software costs
• Describe advanced z/OS environments that utilize Intelligent Resource Director (IRD)

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Tuning methodology

• Describe the basic terms in the process of tuning and system structure
• Outline the tuning methodology, including the factors affecting performance and the individual steps in analyzing system performance

SMF and RMF

• Set up collection and utilize SMF data
• Implement and analyze RMF measurements for Monitors I, II, and III
• Utilize the RMF Spreadsheet Reporter and RMF Performance Management

CPU performance when running in a shared LPAR environment

• Utilize zSeries processor metrics and LPAR weights
• Analyze RMF CPU and LPAR reports
• Describe the functionality of zAAP and zIIP processors

Basic system workload management

• Use WLM dialog to create/modify service definitions
• Create service class goals and classification rules to manage a complex z/OS workload

WLM commands, internals and services

• Understand the behavior and operation of WLM services, including enclaves, application environments, execution delay monitoring, and their use by DB2, WebSphere and CICS
• Optimize the use of WLM-managed initiators

Measure and tune z/OS DASD and processor storage

• Understand DASD configurations in order to analyze RMF DASD reports
• Interpret RMF paging and virtual storage reporting

Additional Topics - Coupling Facility, Intelligent Resource Director (IRD), Global Resource Serialization (GRS), Workload License Charges (WLC)

• Analyze RMF coupling facility reports through an understanding of how a CF operates in a parallel sysplex
• Understand the basic functionality, terminology and benefits of  Intelligent Resource Director (IRD)
• State how GRS operations can be tuned for optimal z/OS performance
• Utilize WLC, defined capacity, and the sub-capacity reporting tool  to optimize software charges
• Describe how WLM implements soft capping

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