when should you use message queues with microservices, prob depends on a few things.

hey all, i've been working on scaling our microservices architecture and have been thinking about using message queues, like RabbitMQ or Kafka. we're hitting some performance issues when services talk directly to each other, especially when things get busy. i'm wondering when other people have decided it's really important to add message queues. is it just for async stuff, or are there particular traffic patterns or dependencies that make it a must-have? what are your usual signs that it's time to add a queue