Namespace: minioNamespace,
					Subsystem: lambdaSubsystem,
					Name:      "active_requests",
					Help:      "Number of in progress requests",
				},
				VariableLabels: map[string]string{"target_id": st.ID.ID, "target_name": st.ID.Name},
				Value:          float64(st.ActiveRequests),
			})
			metrics = append(metrics, MetricV2{
				Description: MetricDescription{

type TargetStats struct {
	TargetStats map[string]TargetStat
}

// TargetStat is the stats of a single target.
type TargetStat struct {
	ID             TargetID
	ActiveRequests int64
	TotalRequests  int64
	FailedRequests int64
}

// TargetList - holds list of targets indexed by target ID.
type TargetList struct {
	sync.RWMutex
	targets map[TargetID]Target
}

    // Backpressure support
    private final boolean backpressureEnabled;
    private final int maxConcurrentRequests;
    private final Semaphore requestSemaphore;
    private final AtomicInteger activeRequests = new AtomicInteger(0);
    private final AtomicLong totalBackpressureRejections = new AtomicLong(0);

    // Enhanced metrics
    private final AtomicLong minResponseTime = new AtomicLong(Long.MAX_VALUE);