if err != nil {
		// This will not be a connection error, but a DSN parse error or
		// another initialization error.
		log.Fatal("unable to use data source name", err)
	}
	defer pool.Close()

	pool.SetConnMaxLifetime(0)
	pool.SetMaxIdleConns(3)
	pool.SetMaxOpenConns(3)

	ctx, stop := context.WithCancel(context.Background())
	defer stop()

	appSignal := make(chan os.Signal, 3)
	signal.Notify(appSignal, os.Interrupt)

	db, err := sql.Open("driver-name", "database=test1")
	if err != nil {
		// This will not be a connection error, but a DSN parse error or
		// another initialization error.
		log.Fatal(err)
	}
	db.SetConnMaxLifetime(0)
	db.SetMaxIdleConns(50)
	db.SetMaxOpenConns(50)

	s := &Service{db: db}

	http.ListenAndServe(":8080", s)
}

type Service struct {
	db *sql.DB
}

pkg crypto/x509, method (InsecureAlgorithmError) Error() string
pkg crypto/x509, method (SignatureAlgorithm) String() string
pkg crypto/x509, type InsecureAlgorithmError int
pkg database/sql, method (*DB) SetConnMaxLifetime(time.Duration)
pkg debug/dwarf, const ClassUnknown = 0
pkg debug/dwarf, const ClassUnknown Class
pkg debug/elf, const COMPRESS_HIOS = 1879048191
pkg debug/elf, const COMPRESS_HIOS CompressionType

		t.Errorf("closes = %d; want 0", closes)
	}
	if g, w := db.numFreeConns(), 2; g != w {
		t.Errorf("free conns = %d; want %d", g, w)
	}

	// Expire first conn
	offset = 11 * time.Second
	db.SetConnMaxLifetime(10 * time.Second)

	tx, err = db.Begin()
	if err != nil {
		t.Fatal(err)
	}
	tx2, err = db.Begin()
	if err != nil {
		t.Fatal(err)
	}
	tx.Commit()
	tx2.Commit()

	db.mu.Unlock()
	if syncMaxIdle {
		db.SetMaxIdleConns(n)
	}
}

// SetConnMaxLifetime sets the maximum amount of time a connection may be reused.
//
// Expired connections may be closed lazily before reuse.
//
// If d <= 0, connections are not closed due to a connection's age.
func (db *DB) SetConnMaxLifetime(d time.Duration) {
	if d < 0 {
		d = 0
	}
	db.mu.Lock()

		{"(*DB).Query", Method, 0},
		{"(*DB).QueryContext", Method, 8},
		{"(*DB).QueryRow", Method, 0},
		{"(*DB).QueryRowContext", Method, 8},
		{"(*DB).SetConnMaxIdleTime", Method, 15},
		{"(*DB).SetConnMaxLifetime", Method, 6},
		{"(*DB).SetMaxIdleConns", Method, 1},
		{"(*DB).SetMaxOpenConns", Method, 2},
		{"(*DB).Stats", Method, 5},
		{"(*Null).Scan", Method, 22},
		{"(*NullBool).Scan", Method, 0},