Top key metrics for monitoring MySQL

Monitoring MySQL with Prometheus is facilitated by using the MySQL Prometheus Exporter, which allows for tracking crucial metrics to ensure optimal database performance and health. The setup involves creating a dedicated user and password for the exporter, configuring the necessary files, and deploying the exporter in a Kubernetes cluster. Key metrics to monitor include availability, connections, slow queries, cache hit rate, and query types, each of which can provide insights into potential issues such as database downtime, connection errors, performance bottlenecks, and inefficient memory usage. Prometheus queries are essential for generating alerts based on these metrics, helping to preemptively address problems. The article emphasizes the ease of implementation and offers guidance on using Prometheus queries to maintain robust database monitoring.