Go to the hey Github page and follow the installation instructions for your operating system to install hey.
The following hey command generates HTTP requests with 200 concurrent clients and lasts for 3 minutes. Find the URL of your service in the App Runner console.
$ hey -c 200 -z 3m https://xxxxxxxxxx.region.awsapprunner.com/
Move on to the next section to see the changing metrics of your App Runner service.