MAXUIDS

MAXUIDS specifies the maximum number of unique UIDs that can use kernel services at the same time. The UIDs can be for interactive users or for programs hat requested kernel services.

MAXUIDS limits the number of active UIDs. When you select a value for MAXUIDS, consider these factors:

Because users are likely to run with three or more concurrent processes each, they require more system resources than typical TSO/E users.
If the MAXUIDS value is too high relative to the MAXPROCSYS value, too many users can invoke the shell. All users might be affected, because forks might begin to fail.
For example, if your installation can support 400® concurrent processes— MAXPROCSYS(400)—and each UID needs an average of 4 processes, then the system can support 100 users. For this operating system, specify MAXUIDS(100).

For an example of MAXUIDS settings in BPXPRMxx, see Monitoring use of system resources.