Overview of IMS data extractor

When the IMS™ data extractor is active all DL/I calls in the target address space are recorded each time a sample is taken. For each DL/I call in flight, all of the call parameters, SSAs etc, are recorded, as well as the module and offset from which the call was made. In a CICS® region there can be multiple IMS threads active and so multiple DL/I calls can be recorded each time an IMS sample is taken in a CICS region.

Additionally, several IMS environment parameters are recorded each time a sample is taken. These parameters include, the region type and its status, the PSB, transaction code, IMS version and release, message sequence number and time stamp from the IOPCB. In the case of a CICS region, the scheduling and termination of PSBs is also recorded.