Spring Boot - Actuator
You want to track the number of active users in your app using Micrometer. Which metric type and approach is best?
You want to track the number of active users in your app using Micrometer. Which metric type and approach is best?
hard📝 Conceptual Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify metric type for current value tracking
Gauge is suitable for tracking current values that can go up or down.Step 2: Match use case to metric type
Active users count changes dynamically, so Gauge with a supplier is best.Final Answer:
Use a Gauge with a supplier returning current active user count -> Option AQuick Check:
Current state tracking = Gauge [OK]
Quick Trick: Gauge tracks current values, Counter only increments [OK]
Common Mistakes:
- Using Counter which only increments, not decrements
- Confusing Timer or DistributionSummary for counts
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