Kubernetes - Monitoring and Logging
What will be the output of this Prometheus query if the metric 'cpu_usage_seconds_total' has values 10 at time T-5m and 20 at time T?
rate(cpu_usage_seconds_total[5m])
What will be the output of this Prometheus query if the metric 'cpu_usage_seconds_total' has values 10 at time T-5m and 20 at time T?
medium📝 Command Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate rate() as per-second increase
Difference = 20 - 10 = 10 seconds over 5 minutes (300 seconds).Step 2: Compute per-second rate
Rate = 10 / 300 = 0.0333 seconds per second.Final Answer:
0.0333 (10 seconds per 300 seconds) -> Option DQuick Check:
rate() = difference / time window [OK]
Quick Trick: rate() = (value difference) / (time in seconds) [OK]
Common Mistakes:
- Using total or current values instead of rate
- Ignoring time window length
- Confusing difference with rate
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