ended4월 4일· 1 sources
High CPU Alerts with Normal Metrics: A Real Elasticsearch Debugging Story
Elasticsearch에서 '정상' CPU로 높은 알림이 울리는 이유 - 메모리 압박과 샤드 불균형의 실제 사례
Why it matters
Production Elasticsearch clusters often present confusing scenarios where high CPU alerts mask deeper issues like memory pressure and shard imbalance. This real-world incident demonstrates why DevOps engineers must look beyond CPU metrics to understand JVM garbage collection, heap memory utilization, and cluster state. Learning to properly investigate and correlate these signals is critical for maintaining reliable Elasticsearch infrastructure.
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ElasticsearchMemory PressureShard RebalancingJVM TuningProduction Incident