Metrics
Metrics are quantitative measurements used to track, monitor, and analyze the performance, health, and behavior of systems, applications, or processes in software development and operations. They provide objective data points that help teams understand trends, identify issues, and make data-driven decisions. Common examples include response times, error rates, CPU usage, and user engagement metrics.
Developers should learn and use metrics to ensure system reliability, optimize performance, and meet service-level objectives (SLOs) in production environments. They are essential for implementing observability, debugging issues, and conducting capacity planning, particularly in DevOps, SRE (Site Reliability Engineering), and microservices architectures. Without metrics, teams operate blindly, risking downtime and poor user experiences.