As New Relic is very complementary with Blackfire, you can easily setup an integration which will trigger pre-configured Blackfire tests any time New Relic sends it an alert, depending on your configured thresholds.
- Go to your
Magento Cloud (<your instance reference>) - ProdBlackfire environment, under the Builds tab
- Click on the "i" icon next to New Relic in the Builds frame configure the integration
Note: You will first need to deploy a configured
.blackfire.yml file to production so that tests can be executed.