code: func (db *DB) configure(prefix string) {
  	// Initialize all the metrics collector at the requested prefix
  	db.compTimeMeter = metrics.NewRegisteredMeter(prefix+"compact/time", nil)
  	db.compReadMeter = metrics.NewRegisteredMeter(prefix+"compact/input", nil)
  	db.compWriteMeter = metrics.NewRegisteredMeter(prefix+"compact/output", nil)
  	db.diskReadMeter = metrics.NewRegisteredMeter(prefix+"disk/read", nil)
  	db.diskWriteMeter = metrics.NewRegisteredMeter(prefix+"disk/write", nil)
  	db.writeDelayMeter = metrics.NewRegisteredMeter(prefix+"compact/writedelay/duration", nil)
  	db.writeDelayNMeter = metrics.NewRegisteredMeter(prefix+"compact/writedelay/counter", nil)
  }
docs: // Configure configures the database metrics collectors