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Introduction:
OS/390 tuning
entails a balancing of the consumption of available
resources (storage, CPU and I/O activity) against the
installation's desired ends (throughput). SRM uses swapping
and dispatching priority adjustment to achieve performance
objectives.
This course studies the individual resource managers that
make up the OS/390 system and the sources of information
they use to make tuning adjustments. The course also
examines in detail the causes of swapping and methods to
control it. Using output from the Resource Measurement
Facility (RMF), the student will learn to determine when the
system is behaving according to installation supplied rules
and how to adjust it to meet installation tuning goals. All
performance related parameters in SYS1.PARMLIB are
discussed, as well. The performance impact of large virtual,
real, and expanded storage in OS/390 is examined..
Audience: This course is intended for systems
programmers and performance analysts responsible for
measurement and tuning of OS/390 systems.
Prerequisites: A working knowledge of OS/390, which can be
obtained from OS/390
Concepts and Facilities, OS/390
Structure and Logic,
or an equivalent course.
Objectives: On completion of this course, the student
should be able to:
- describe the resource
management functions that are externally tunable and make
adjustments to them to affect system performance
- describe the function of
the SRM workload manager and create performance
specifications to enforce the installation's performance
goals
- develop a strategy for
operating OS/390 version 5 workload manager in goal
mode
- use RMF reports to find
opportunities to improve system performance and measure
the success of changes to system performance
parameters
- implement a systematic
approach to performance analysis and tuning
Duration:
This course is
5 days long.
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