A web application runs on Amazon EC2 instances behind an Application Load Balancer. The application allows users to create custom reports of historical weather ...

A web application runs on Amazon EC2 instances behind an Application Load Balancer. The application allows users to create custom reports of historical weather data. Generating a report can take up to 5 minutes. These long-running requests use many of the available incoming connections, making the system unresponsive to other users.
How can a solutions architect make the system more responsive?