Go Database Patterns

Database access is where most Go services spend their complexity budget. Get connection management, transactions, and query patterns right.

1. Connection Management

Configure the connection pool explicitly:

func OpenDB(dsn string) (*sql.DB, error) {
    db, err := sql.Open("postgres", dsn)
    if err != nil {
        return nil, fmt.Errorf("open db: %w", err)
    }

    db.SetMaxOpenConns(25)
    db.SetMaxIdleConns(10)
    db.SetConnMaxLifetime(5 * time.Minute)