I have a situation where someone has changed the limit of a GDG (Generation Data Group) and I need to track down who made the change. I know the command will be something like:

ALTER gdg-base LIMIT(xx)

Is this type of change audited by System Management Facility (SMF)? I took a cruise through the SMF manual but couldn’t find a hit.


According to z/OS DFSMS Managing Catalogs (SC23-6853-00), SMF record type 66 records ALTER entries to the BCS. Of course, this assumes they are being recorded. On my system of record (an ADCD/ADLT-based z/OS system), they are being recorded by default.

61 (DEFINE) and 65 (DELETE) look useful as well.

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