The maximum number of copies of the optimizing information collection utility (pdgetcst) that can be executed concurrently depends on a value specified in the pd_utl_exec_mode operand of the system common definition:

pd_utl_exec_mode=0

A maximum of 16 copies can be executed concurrently.

pd_utl_exec_mode=1

The maximum number of copies of the utility that can be executed concurrently is equal to one half of the value specified in the pd_max_users operand.