CICS Attachments

For threads that originate from the CICS/Db2 attachment, the reported thread CPU usage is entirely attributable to the CICS/Db2 thread. In other words, it is entirely attributable to the CICS/Db2 attachment TCB servicing the thread. The CPU rate includes MVS™ TCB time only; SRB time is not included. Any CPU usage reported for CICS/Db2 threads is a subset of total CICS® address space CPU utilization.

For example, assume that the total CICS address space CPU utilization is 50%, and two threads originate from the CICS connection. If one thread has a reported CPU rate of 5% and the other's rate is 10%, the conclusion is that 15% of CICS address space CPU utilization is attributable to servicing Db2 requests. Also, 30% (15% / 50% = 30%) of total CICS address space utilization is attributable to servicing Db2 requests.

CPU utilization reported for CICS threads is the same, regardless of the version of the Db2 subsystem being monitored.