Type-2 trace tables
You can activate IMS type-2 trace tables at IMS startup or while IMS is active. Unlike type-1 trace tables, type-2 trace tables can be updated dynamically using the UPDATE TRACE command while IMS is up, and they can be queried to gather diagnostic information.
The settings for type-2 trace tables are specified in the DFSDFxxx PROCLIB member by using the TRCLEV statement. The size of each type-2 trace table can be specified by the user, whereas the size of type-1 trace tables is a fixed value determined by IMS. Type-2 trace tables can be used in the same environments as type-1 trace tables.
For more information about the differences between type-1 and type-2 trace tables, see IMS Trace Facility.
Type-2 trace records are written to one or more of the trace tables that are shown in the
following table:
| Table type | Table description |
|---|---|
| DDL | Traces DDL events within IMS. |
| ERR | Traces error events within IMS |
| TRCE | Traces IMS trace services events |
| USRX | Traces IMS User Exit services |
| OTEL | Traces IMS OpenTelemetry services |