The following functions run as processes:

The user table contains one entry per process. Use the Number of Users (-n) parameter to specify the number of users.

On UNIX, the NPROC parameter limits the total number of active processes on the system and is commonly set between 50 and 200. The MAXUP parameter limits the number of concurrent processes that can be started by a single user ID, and it is commonly set between 15 and 25. Also, if more than one user logs in with the same user ID, MAXUP can be exceeded quickly. The following error message is displayed when the process limit is exceeded:

If you see this message repeatedly, you should reconfigure your system kernel.