Kafka - Monitoring and Operations
You want to alert when Kafka broker CPU usage exceeds 80% for 5 minutes. Which Prometheus alert rule is correct?
You want to alert when Kafka broker CPU usage exceeds 80% for 5 minutes. Which Prometheus alert rule is correct?
hard🚀 Application Q9 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand CPU usage metric
process_cpu_seconds_total is a counter of CPU seconds used.Step 2: Use rate() to get CPU usage per second over 5 minutes
rate(process_cpu_seconds_total[5m]) gives CPU usage rate.Step 3: Alert if average CPU usage per instance exceeds 0.8 (80%) for 5 minutes
alert: HighKafkaCPU expr: avg(rate(process_cpu_seconds_total[5m])) by (instance) > 0.8 for: 5m matches this logic correctly.Final Answer:
avg(rate(process_cpu_seconds_total[5m])) by (instance) > 0.8 for: 5m -> Option AQuick Check:
Use rate() and avg() over 5m for CPU alert [OK]
Quick Trick: Use rate() on CPU counter and avg() over 5m [OK]
Common Mistakes:
MISTAKES- Using raw counter without rate()
- Wrong threshold units (80 vs 0.8)
- Shorter time windows than required
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