The administrator can assign an upper limit to the number of jobs that any user or any UNIX group can run at any time. In order to enforce this feature, do one of the following:
Set maxujobs or maxgjobs, or both, as described in the sched_conf(5) man page.
On the General Parameters tab of the Scheduler Configuration dialog box, use the Max Jobs/User field to set the maximum number of jobs a user or user group can run concurrently.