metrics = append(metrics, MetricV2{
				Description: MetricDescription{
					Namespace: minioNamespace,
					Subsystem: auditSubsystem,
					Name:      "target_queue_length",
					Help:      "Number of unsent messages in queue for target",
					Type:      gaugeMetric,
				},
				VariableLabels: map[string]string{"target_id": id},
				Value:          float64(st.QueueLength),
			})