6. DATA SOURCES › 6.6 I/O Measurements and Device Activity › 6.6.1 What Is an I/O? › 6.6.1.1 Where Does CA MICS Obtain Its I/O Counts?

6.6.1.1 Where Does CA MICS Obtain Its I/O Counts?

The EXCP counts provided in SMF come from the SMF type 30,
Common Address Space Workload Record.  The device segments
contained in this record report EXCPs for data sets allocated
dynamically and by JCL DD statements.