> ## 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.

# Execution queue limits

To prevent too many queued executions from overwhelming a Domino deployment, limit the number of execution slots that can be queued globally or per user.

To do this, use the `com.cerebro.domino.computegrid.userExecutionsQuota.globalExecutionQueueLimit` or `com.cerebro.domino.computegrid.userExecutionsQuota.userExecutionQueueLimit` configuration parameter. See [Configuration records](/6.3/admin/configuration/central-configuration#compute-grid) for details.

Once a queue limit is reached, additional executions are rejected with a failure status. 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.