2. PERFORMANCE REPORTING ANALYSIS › 2.7 Graphic Analysis › 2.7.3 TSO Service Graphs › 2.7.3.2 TSO Complex Response

2.7.3.2 TSO Complex Response

GRAPHIC RESULTS

This graphic analysis provides a line plot of TSO overall
complex response time.  This will show you average TSO
response times for transactions that may vary considerably in
resource requirements.

ANALYSIS GUIDELINES

This plot shows you what sort of variability you are
experiencing in overall TSO response times.  In conjunction
with the TSO first period graph, this plot will help you
determine whether consistent first period response times are
being maintained in spite of fluctuations in overall complex
TSO response times.

TSO non-first period workloads are more closely related to
batch type work in one sense:  their resource consumption can
vary substantially, thus leading to the potential for
response time variability.  You do not have the kind of
control over this response time that you can have over first
period response times.

Due to this variability, you may not want to commit to
service level objectives for overall TSO response times.
Periodically tracking its response tendencies, however, may
provide you with early warning about resource constraints or
contention issues.  If you discover that overall TSO response
time is beginning to climb or increase in variability,
especially during peak periods, you may want to investigate
more fully what the potential causes might be.

The detailed behavior of TSO workloads and the system
influences that may be affecting them can be further analyzed
using the Installation Performance Specification analysis
reports and the sysplex analysis reports described in Section
2.8.

SPECIAL CONSIDERATIONS

For systems still utilizing performance groups, you do not
need to specify the performance groups that constitute TSO to
produce either the plot of TSO first period response time or
the one of overall complex TSO response time.  Your TSO
performance groups will automatically be chosen for these
graphs.  However, if you have several performance groups that
constitute TSO but have different service level objectives,
are they managed differently by the SRM, or do they tend to
have markedly different resource requirements?  You may use
the performance group selection capability found on the main
selection screen for either graphic analysis to determine
which performance group will be included in a plot.

For systems operating in "goal mode," the analysis attempts
to determine TSO service classes/periods by searching for the
characters "TSO" in either the service class name or the
service definition name.  If your TSO service classes follow
the convention of incorporating TSO in the class name or
definition name, the analysis will automatically choose those
classes for reporting.  Alternatively, you can use the
service class selection capability found on the main
selection screen of both analyses to determine which service
classes will be included in a plot.