To prevent a single user from monopolizing a Domino deployment, limit the number of simultaneous executions a user can run concurrently.
To do this, use the com.cerebro.domino.computegrid.userExecutionsQuota.maximumExecutionsPerUser configuration parameter. See Central Configuration for details.
After the limit of simultaneously running executions is reached for a user, additional executions are queued. The count includes executions for Domino workspaces, jobs, web applications, and any executions that make up an on-demand distributed compute cluster. For example, an on-demand Spark cluster consumes an execution slot for the master and each Spark executor.