Top metrics for Elasticsearch monitoring with Prometheus

Elasticsearch, a widely-used search and analytics engine, offers scalability and redundancy, making it a popular choice for over sixty thousand companies by 2023. Monitoring its performance is crucial, and Prometheus, along with the Elasticsearch exporter, provides a suite of metrics to facilitate this process. Key areas of focus include infrastructure metrics like CPU and JVM memory usage, index performance, and search and cluster performance. The importance of tracking "Golden Signals" such as errors, traffic, saturation, and latency is highlighted for effective monitoring. Tools like PromCat.io and the Elasticsearch REST API enhance the visibility and management of Elasticsearch environments. Additionally, advanced tools such as Java VisualVM and customizable dashboards available through Promcat can be integrated with solutions like Grafana or Sysdig Monitor for more detailed insights.