For the vast majority of cases that we deal with, we don't really need much for resources to run this application.
One specific test uses approximately 20k goroutines and averages 15-20MB RAM depending on test load. As for CPU utilization, the impact is minimal; RabbitMQ is the biggest bottleneck, as our peak message throughput for a single RabbitMQ broker is about 50k/messages per second, which our go process is able to handle without much issue. The worst-case scenario that I've been able to test for is one where those 50k messages are evenly spread across different queues; even then, our CPU utilization wasn't any higher than 15%/core on a 12-core server.
One specific test uses approximately 20k goroutines and averages 15-20MB RAM depending on test load. As for CPU utilization, the impact is minimal; RabbitMQ is the biggest bottleneck, as our peak message throughput for a single RabbitMQ broker is about 50k/messages per second, which our go process is able to handle without much issue. The worst-case scenario that I've been able to test for is one where those 50k messages are evenly spread across different queues; even then, our CPU utilization wasn't any higher than 15%/core on a 12-core server.