Building Cross-Team SLO Contracts for Performance Accountability

If you have ever developed a popular website in a microservice architecture, then most likely you have come across this case when, at first, your latency seems to increase. Then you check your dashboard and notice that the P90 latency has increased by 300ms in the past two weeks. It is very likely you will want to analyze the individual spans and see that one of your upstream dependencies, which belongs to another team, is slower.