Activating Fast Path traces

In a Database Control (DBCTL) environment, you can trace DL/I and Fast Path activity. You turn on the DL/I trace in the same way as in a DB/DC environment.

The trace records for coordinator controller (CCTL) threads contain the recovery token that can help you correlate CCTL tasks with DBCTL threads.

Activate Fast Path tracing in one of the following ways:

• The DBCTL operator can enter the /TRACE SET ON TABLE FAST command. This is the same way you activate the trace in a DB/DC environment. In both DBCTL and DB/DC environments, you must also specify the FPTRACE DD statement in the IMSFP procedure, which is described in IMSFP procedure.
• The CCTL decides which transactions to trace and directs DBCTL to activate the trace for those transactions. After the transaction completes, the trace output file is closed and sent to the SYSOUT data set, class A. However, when certain transactions fail in Fast Path processing and the trace is not already active, the database resource adapter (DRA) recommends to the CCTL that Fast Path tracing be activated. The failures for which tracing is recommended are based on the list that IMS uses for Fast Path Transaction Retry. The CCTL can then direct DBCTL (through the DRA) to activate Fast Path tracing the next time that transaction is scheduled.