Database Connection Pooling Fixes Common Go API Performance Issues

Go applications often encounter database connection errors under real traffic due to a lack of proper connection pooling. A common mistake is opening and closing a new database connection for each HTTP request, which quickly exhausts database limits. The solution is to create a single, shared database connection pool at application startup and configure it correctly. Key configuration parameters include setting maximum open and idle connections, along with connection lifetimes. Properly tuning these settings prevents the API from overwhelming the database and improves performance under load.