Monitoring Queues
A key performance indicator is the status of Elasticsearch queues: index, search, and bulk. These queues, reported in node stats, should ideally be nearly empty, indicating that requests are processed promptly. Persistent queues indicate underlying issues that need to be addressed. Tools like Marvel (or X-Pack in newer versions) can help monitor these queues. Persistent queues indicate underlying problems that need to be addressed.
Elasticsearch Performance Tuning
As your Elasticsearch cluster grows and your usage evolves, you might notice a decline in performance. This can stem from various factors, including changes in data volume, query complexity, and how the cluster is utilized. To maintain optimal performance, it’s crucial to set up monitoring and alerting systems that can preemptively highlight issues, allowing you to manage maintenance effectively.