Do you need required secondary allocations for the Sysview Performance Management Option for Db2 for z/OS (IDB2) history and accounting files?
Secondary allocation: In hlq.SOURCE(SSIDVSAM) see the following:
HSTSTATS, HSTACCTG: CHANGE ONLY PRIMARY ALLOCATION AS REQUIRED.
SEE SYSTEM GUIDE FOR SPACE ALLOCATIONS SECONDARY EXTENTS SHOULD NOT BE SPECIFIED.