Why is it important to track application metrics and what can they help determine?

Tracking application metrics is important for understanding its state and performance. Metrics allow:

• Early problem detection: For example, an increase in response time or error count can signal failures.
• Performance optimization: Analyzing metrics helps identify bottlenecks and improve operation.
• Resource planning: Load metrics assist in properly scaling infrastructure.
• Quality support: Monitoring stability and availability of the application.

Example metrics: API response time, number of requests per second, CPU and memory usage, number of 500 errors.

Without metrics, it is difficult to understand how the application operates in real conditions and to respond promptly to issues.