The RED Method: How to Instrument Your Services

At GrafanaCon EU, Tom Wilkie introduced the RED Method, a monitoring approach tailored for microservices, which he developed in response to the limitations of the USE Method, a popular instrumenting technique for hardware resources. The RED Method focuses on monitoring the rate of requests per second, the error rate of those requests, and the duration they take, providing a consistent view of service performance and user experience across different services. This method is complemented by Google's Four Golden Signals, which adds saturation to the metrics, and together they offer a comprehensive framework for service monitoring. Wilkie advocates for using the RED and USE Methods in tandem to address both user satisfaction and machine efficiency, emphasizing that these methods provide different perspectives on the same system and enhance operational scalability and alert accuracy.

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