Grafana

Practical Guidance for Engineers Using Prometheus + Go’s database/sql Metrics Most application performance issues in database-backed systems aren’t caused by MySQL itself — they come from connection pool pressure, slow acquisition, or misconfigured limits. This post is a practical guide to understanding the key Prometheus db_sql_* metrics, why they matter, and how to visualize them effectively in Grafana. 1. What Are db_sql_* Metrics? When using Go’s database/sql along with Prometheus instrumentation, your service emits a standardized set of metrics that describe your client-side connection pool behavior. These cover: ...