Gathering performance-related data

IMS provides the DB Monitor and the IMS Monitor that gather and format IMS performance-related data and record this data on a statistics log.

The DB Monitor is available to IMS batch systems; it can monitor the activity between application programs and databases. The IMS Monitor is available to IMS online systems. In addition to performing all of the functions of the DB Monitor, the IMS Monitor can track and record information about activities occurring in the IMS control region and data communication activities.

IMS uses the statistics produced by each Monitor to generate reports. The report programs run offline and print reports that summarize and categorize IMS activities.

The DB Monitor records performance data during execution of an IMS DB batch system. The DB Monitor can be active during the entire execution of an IMS batch job, or you can stop and restart it from the system console.