CICS® includes several facilities to perform the
tasks of accounting and monitoring. These facilities can be used to
measure the use of different resources within a CICS system. The most frequently used tools
are:
- Statistics data. CICS statistics are the
simplest tool for monitoring a CICS system. They contain information
about the CICS system as a whole, such as its performance and use
of resources. This makes CICS statistics suitable for performance
tuning and capacity planning. CICS collects statistics during online
processing, and processes them offline later. The statistics domain
collects this data and then writes records to the System Management Facility (SMF)
data set provided by MVS™. The records are of SMF type 110.
You can process these records offline using the DFHSTUP program.
- Monitoring data. CICS monitoring collects data about all user and
CICS-supplied transactions during online processing for later offline
analysis. The records produced by CICS monitoring are also of SMF
type 110 and are written to the SMF data sets. Data provided by CICS
monitoring is useful for performance tuning and for charging your
users for the resources they use. Monitoring provides three classes
of data:
- Performance class for detailed transaction level information
- Transaction resource data for additional transaction-level information
about individual resources accessed by a transaction
- Exception class for exceptional conditions
CICS is a multitasking address space, and CICS monitoring facilities
are generally used to determine the processor time and other resources
consumed by the individual transactions or functions performed by
CICS.
For a full description of the CICS monitoring facilities, and details
on activating, collecting, and processing this information, see the CICS Performance Guide, and the CICS Customization Guide.
For both statistics data and monitoring data, you can use an offline
processing facility. CICS Performance
Analyzer and Tivoli® Decision Support for OS/390® are
two tools that collect and analyze data from CICS and other IBM® systems
and products. They can build reports that help you with:
- Systems overview
- Service levels
- Availability
- Performance and tuning
- Capacity planning
For more information on CICS Performance Analyzer and Tivoli
Decision Support for OS/390, see the CICS Performance Guide.
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