The SDM writes an SMF type 42 subtype 4 record that contains session
statistics. Among other things, you can use the information in this
record to determine the following:
- Session initialization time
- Maximum size of host and storage subsystem sidefiles
- Number of intercepted writes.
For additional information about the SMF type 42 subtype 4 record,
refer to Concurrent copy information in SMF type 42 records.