APM
APM (Application Performance Monitoring) is a set of tools and practices used to monitor and manage the performance, availability, and user experience of software applications in real-time. It collects metrics such as response times, error rates, and resource utilization to help identify bottlenecks and optimize application performance. APM solutions typically include features like transaction tracing, code-level diagnostics, and alerting to ensure applications run efficiently and reliably.
Developers should learn and use APM to proactively detect and resolve performance issues in production environments, especially for complex, distributed applications like microservices or cloud-native systems. It is crucial for maintaining high availability, improving user satisfaction, and reducing downtime by providing insights into application behavior under load. APM is particularly valuable in DevOps and SRE (Site Reliability Engineering) contexts for continuous monitoring and performance optimization.