Additional performance tools

The generalized trace facility (GTF) and the Resource Measurement Facility (RMF) are additional performance tools that you may want to consider using with DBCTL if you already have them or are considering adding them to your system.

Generalized trace facility (GTF)

If you use the IRLM as your locking manager, you can use the generalized trace facility (GTF) to provide a trace of its activity. It traces request handler request completions, the PTB input/output buffers, and statistical data relevant to the IRLM.

You can print the records GTF produces offline. Output is collected in a data set specified by its user in the GTF job. For guidance on using GTF, which you may find of use in debugging, see Diagnosis in IMS product documentation.

Resource Measurement Facility (RMF)

The Resource Measurement Facility (RMF) is a measurement tool designed to meet the needs of performance management in the large systems environment that MVS supports.

Its primary purpose is to reduce the amount of system programmer time and expertise required to identify and to diagnose system tuning problems. It is designed to monitor selected areas of system activity and present the data collected in the form of SMF records or formatted reports. Display reports are also available for some system activities. For more details, see Resource measurement facility and z/OS Resource Measurement Facility (RMF) User's Guide.