What is a Counter in the context of Cloud Native Observability?

What is a Counter in the context of Cloud Native Observability?

• A. A cumulative metric that increases over time
• B. A metric that only decreases
• C. A log type
• D. A trace

Answer: (A)

In Cloud Native Observability, a Counter is a numeric metric that monotonically increases as events occur, providing a cumulative tally over time. It’s used to count occurrences like requests, errors, or completed operations. Counters are non-decreasing and may reset to zero after a restart, which is important to consider when computing rates (for example, using rate() or increase() in Prometheus). This differentiates them from a gauge (which can go up and down) and from logs or traces (which serve different purposes: logs record events, and traces map the path of a request across services).

In Cloud Native Observability, a Counter is a numeric metric that monotonically increases as events occur, providing a cumulative tally over time. It’s used to count occurrences like requests, errors, or completed operations. Counters are non-decreasing and may reset to zero after a restart, which is important to consider when computing rates (for example, using rate() or increase() in Prometheus). This differentiates them from a gauge (which can go up and down) and from logs or traces (which serve different purposes: logs record events, and traces map the path of a request across services).