determine the impact on performance and resource utilization when an egress gateway is added in the service mesh to access an external service (MongoDB, in this case). The steps to configure an egress gateway for an external MongoDB are described in the blog <a href=/v1.1/blog/2018/egress-mongo/>Consuming External MongoDB Services</a>.</p><p>The application used for this investigation was the Java version of Acmeair, which simulates an airline reservation system. This application is used in the Performance 