2. PERFORMANCE REPORTING ANALYSIS › 2.7 Graphic Analysis

2.7 Graphic Analysis

This section describes the graphic analyses available in the
Performance Manager.  Graphic analysis of performance and
service indicators provides you with several series of graphs
to assist you in tracking and analyzing system behavior and
key service related indicators.  This chapter provides
guidelines for interpreting these graphs and for producing
them.  These graphs can provide you views of system and
workload performance for a variety of time perspectives from
the very detailed to a perspective covering weeks or months.

The CPU graphs can help you understand both the utilization
patterns of your processors and the distribution of this
utilization among various workloads.  This can help you
ensure that the processors, as critical resources are being
used to satisfy your key workloads.

The storage graphs show you the distribution of storage among
the various system areas as well as the distribution of
storage use among workloads.  As with the CPU graphs, these
storage graphs help you ensure that storage, as a critical
resource, is being used to satisfy your key workloads.

The TSO graphs can assist you in tracking MVS response time
for TSO and easily focuses your attention toward periods
during which service levels were exceeding expectations or
agreed upon objectives.

The I/O tracking graphs can help you focus on particular disk
devices and time periods that may have experienced I/O
bottlenecks.

The paging graphs help you to manage the performance of the
MVS auxiliary storage.  They will help you quickly discover
whether any potential performance problems exist with your
paging volumes and assist you in focusing rapidly on any
problem when it is discovered.

Producing graphs is discussed in the final sections of this
chapter.  These sections can assist you in choosing graphic
options, the time periods and systems upon which to report,
and the methods for providing workload descriptions.

The following sections in this chapter discuss the use and
interpretation of these graphs:

    1 - CPU Graphs
    2 - Storage Graphs
    3 - TSO Service Graphs
    4 - I/O Tracking Graphs
    5 - Paging Graphs
    6 - Producing Graphs