Posted inMonitoring
Monitoring Elasticsearch and OpenSearch Clusters with Prometheus Exporter and Grafana: Tracking Index Health, Query Latency, and System Resources
A practical guide to monitoring Elasticsearch and OpenSearch clusters with Prometheus Exporter and Grafana, covering a comparison of approaches, elasticsearch_exporter setup, and alert configuration for JVM heap, unassigned shards, and disk watermark. Hard-won lessons from 6 months running 50 million documents in production.