Help:      "Maximum replication link latency in milliseconds seen since server start",
		Type:      gaugeMetric,
	}
}

func getClusterRepLinkLatencyAvgMD() MetricDescription {
	return MetricDescription{
		Namespace: clusterMetricNamespace,
		Subsystem: replicationSubsystem,
		Name:      avgLinkLatency,
		Help:      "Average replication link latency in milliseconds",
		Type:      gaugeMetric,
	}
}

	m.init = true
	m.singleResp = true
	msg := message{
		Op:         OpRequest,
		MuxID:      m.MuxID,
		Handler:    h,
		Flags:      m.BaseFlags | FlagEOF,
		Payload:    req,
		DeadlineMS: uint32(m.deadline.Milliseconds()),
	}
	if m.subroute != nil {
		msg.Flags |= FlagSubroute
	}
	ch := make(chan Response, 1)
	m.respMu.Lock()
	if m.closed {
		m.respMu.Unlock()
		return nil, ErrDisconnected
	}
	m.respWait = ch

	vTime := t.lastUpdateMs.Load()
	tNow := time.Now().UnixMilli()
	if v != nil && tNow-vTime < ttl.Milliseconds() {
		if v.e == nil {
			return v.v, nil
		}
		if v.e != nil && t.opts.CacheError || t.opts.ReturnLastGood {
			return v.v, v.e
		}
	}

	// Fetch new value.
	if t.opts.NoWait && v != nil && tNow-vTime < ttl.Milliseconds()*2 && (v.e == nil || t.opts.CacheError) {
		if t.updating.TryLock() {
			go func() {

| `minio_cluster_replication_max_link_latency_ms`            | Maximum replication link latency in milliseconds seen since server start                                 |
| `minio_cluster_replication_current_link_latency_ms`        | Current replication link latency in milliseconds                                                         |

	}

	return addrs
}

// TCPOptions specify customizable TCP optimizations on raw socket
type TCPOptions struct {
	UserTimeout int // this value is expected to be in milliseconds
	// When the net.Conn is idle for more than ReadTimeout duration, we close the connection on the client proactively.
	ClientReadTimeout time.Duration

	if err != nil {
		atomic.AddUint64(&sys.TotalRefreshFailures, 1)
		return err
	}
	loadDuration := time.Since(loadStartTime)

	atomic.StoreUint64(&sys.LastRefreshDurationMilliseconds, uint64(loadDuration.Milliseconds()))
	atomic.StoreUint64(&sys.LastRefreshTimeUnixNano, uint64(loadStartTime.Add(loadDuration).UnixNano()))
	atomic.AddUint64(&sys.TotalRefreshSuccesses, 1)

	if !globalSiteReplicatorCred.IsValid() {

| `minio_cluster_iam_last_sync_duration_millis`                   | `counter` | Last successful IAM data sync duration in milliseconds                                                                   |        |

	syncSuccesses                          = "sync_successes"
)

var (
	lastSyncDurationMillisMD                 = NewCounterMD(lastSyncDurationMillis, "Last successful IAM data sync duration in milliseconds")
	pluginAuthnServiceFailedRequestsMinuteMD = NewCounterMD(pluginAuthnServiceFailedRequestsMinute, "When plugin authentication is configured, returns failed requests count in the last full minute")

			b, err = handler(m.Payload)
			if debugPrint {
				fmt.Println(c.Local, "Handler returned payload:", bytesOrLength(b), "err:", err)
			}
		}()

		if m.DeadlineMS > 0 && time.Since(start).Milliseconds()+c.addDeadline.Milliseconds() > int64(m.DeadlineMS) {
			if debugReqs {
				fmt.Println(m.MuxID, c.StringReverse(), "DEADLINE EXCEEDED")
			}
			// No need to return result
			PutByteBuffer(b)
			return
		}

		select {
		case <-ctx.Done():
			return ctx.Err()
		default:
			// Sleep and stagger to avoid blocked CPU and thundering
			// herd upon start up sequence.
			time.Sleep(25*time.Millisecond + time.Duration(rand.Int63n(int64(100*time.Millisecond))))
			retries++
			// after 20 retries start logging that servers are not reachable yet
			if retries >= 20 {