If you use data compression via sysparm DCDATACP in your BACKUP/ARCIVE jobs, you need to make sure PTF RO86193 is installed. It corrects a performance problem when using DCDATACP = Y and the default of DCCOMPTC = 0 on a z/Architecture processor.
If you are using a DATACOM Files DB, then Datacom/AD can use zIIP processing using startup options SMPTASK and ZIIP_USER_LIMIT. You must run tasks in SRB mode to use zIIP processing. Specify SRB mode in the SMPTASK MUF startup option (see SMPTASK). The ZIIP_USER_LIMIT MUF startup option can be useful as a tuning option but is not required to do zIIP processing.
There is a MUF EOJ Report for zIIP which should show if zIIP is enabled correctly, see section "ENCLAVE SRB USE SUMMARY INFORMATION" of the MUF EOJ Report.
For details, see Chapter 4: zIIP Processors in the CA DATACOM/DB Database and System Administration Guide.
Using a Datacom Files DB, processes which make a lot of use of the Datacom FDB, like IXMAINT or LISTD, should see a reduction, but ARCHIVE and BACKUP would not much.