Monitoring and statistics
Monitoring provides information about the status of individual requests. Statistics provide information about the performance of runtime components.
Request monitoring exits can optionally be used for driving user exit code on a per request basis. One or more user exit programs can be called for each request if details of each request are made available. All user exit code is called inline; this means that performance of the user exit code is critical.
CICS® Transaction Gateway statistics are always active and predefined by IBM®. Unlike the request monitoring exits, the statistics provide summary information such as running totals, averages, status, and configuration values. Statistics are either displayed from system management commands, or can be obtained through a program that uses the statistics API. Statistics are optionally recorded to the System Management Facility (SMF) at regular intervals and are always written to SMF at the logical end of day.