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Chapter 28. CICS monitoring
This section describes the monitoring facilities of CICS Transaction Server for z/OS,
Version 3 Release 2, and tells you how to:
v Control the types of monitoring data collected by CICS.
v Gather more performance data about specific transactions than is provided
automatically by CICS.
The section covers:
1. “Introduction to CICS monitoring” describes the classes of monitoring data,
event-monitoring points, and the use of the monitoring control table.
2. “CICS monitoring record formats” on page 750 describes the formats of CICS
monitoring SMF type 110 records.
3. Processing the output from the CICS Monitoring Facility lists the methods of
processing monitoring data.
the CICS Performance Guide, lists all the system-defined data that can be
produced by CICS monitoring.
Introduction to CICS monitoring
CICS monitoring collects data about the performance of all user- and CICS-supplied
transactions during online processing for later offline analysis. The records
produced by CICS monitoring are of the MVS System Management Facility (SMF)
type 110, and are written to an SMF data set.
Statistics records and some journaling records are also written to the SMF data set
as type 110 records. You might find it particularly useful to process the statistics
records and the monitoring records together, because statistics provide resource
and system information that is complementary to the transaction data produced by
CICS monitoring. The contents of the statistics fields, and the procedure for
processing them, are described in Chapter 29, “Writing statistics collection and
analysis programs,” on page 769.
Monitoring data is useful both for performance tuning and for charging your users
for the resources they use.
How CICS monitoring data is passed to SMF
The various CICS monitoring class records are written to SMF in different ways.
Performance data records are written to a performance record buffer, which is
defined and controlled by CICS, as the records are produced. The performance
records are passed to SMF for processing when the buffer is full, when the
performance class of monitoring is switched off, and when CICS itself quiesces.
When monitoring itself is deactivated or when there is an immediate shutdown of
CICS, the performance records are not written to SMF and the data is lost.
Transaction resource class data records are written to a transaction resource
record buffer, which is defined and controlled by CICS, as the records are
produced. The transaction resource records are passed to SMF for processing
when the buffer is full; when the transaction resource class of monitoring is
switched off; and when CICS itself quiesces. When monitoring itself is deactivated
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