The format of the type 231 SMF records is not documented as they are mainly intended for product internal usage.
The STATG records themselves are just a series of print formatted records directly recorded as is in the SMF records.
Here is a snippet of the actual content of the STATG type 231 records:
CA Top Secret Security SYSPLEX Number of writes: 0
CA Top Secret Security CACHE Max size of cache: 60000
CA Top Secret Security CMDSTATS CREATE: 0
CA Top Secret Security CPF XE56 INBD CMDS PROCESSED: 0
CA Top Secret Security CPF XE14 INBD CMDS PROCESSED: 0
CA Top Secret Security IOSTATS Number of RACINITS 342
CA Top Secret Security RACROUTE RACROUTE REQUEST = AUDIT 0
CA Top Secret Security SECCACHE Maximum size of cache data area: 2147483648
We document the mapping of the 231 records via four distributed elements:
CAKOJCL0(S231DESC) - describes the format of the SMF 231 records to make the macro usage easier to understand
CAKOMAC0(#SMF80) - describes the format of the base type 80 record (which is the same base used for the type 231 records)
CAKOMAC0(TSSSMFOX) - describes the format of the type 231 record extension
CAKOSRC0(S231ASSM) - sample JCL which can be used to generate the mapping for the type 231 records
Review these mapping members and use them to examine the type 231 records in the SMF data store.