> ## Documentation Index
> Fetch the complete documentation index at: https://docs.domino.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Set user executions quota

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 [Configuration records](/6.3/admin/configuration/central-configuration#compute-grid) 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.