System job processing for job accounting
System jobs that you control (for example, readers and writers) are assigned an accounting code of *SYS. Other system jobs that you do not control (for example, QSYSARB, QLUS,SCPF) do not receive a journal entry.
Note: You cannot use the Change Accounting Code (CHGACGCDE) command
to change the accounting code of the subsystem monitor or a reader
or writer. You can, however, change the accounting code of a reader
or writer by changing the appropriate IBM-supplied job descriptions
and user profiles and then starting them again.