{
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },
          "expr": "(histogram_quantile(0.50, sum(irate(istio_request_duration_milliseconds_bucket{reporter=~\"$qrep\",destination_service=~\"$service\"}[1m])) by (le)) / 1000) or histogram_quantile(0.50, sum(irate(istio_request_duration_seconds_bucket{reporter=~\"$qrep\",destination_service=~\"$service\"}[1m])) by (le))",

        {
          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },

		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,
	}
}

    try {
      CacheBuilder<Object, Object> builder =
          createCacheBuilder()
              .expireAfterWrite(100, MILLISECONDS)
              .refreshAfterWrite(5, MILLISECONDS)
              .ticker(ticker);

      CacheLoader<String, String> loader =
          new CacheLoader<String, String>() {
            @Override

    try {
      CacheBuilder<Object, Object> builder =
          createCacheBuilder()
              .expireAfterWrite(100, MILLISECONDS)
              .refreshAfterWrite(5, MILLISECONDS)
              .ticker(ticker);

      CacheLoader<String, String> loader =
          new CacheLoader<String, String>() {
            @Override

  @Test
  fun timeoutsUpdatedOnReusedConnections() {
    server.enqueue(MockResponse(body = "abc"))
    server.enqueue(
      MockResponse.Builder()
        .body("def")
        .throttleBody(1, 750, TimeUnit.MILLISECONDS)
        .build(),
    )

    // First request: time out after 1s.
    client =
      client.newBuilder()
        .readTimeout(Duration.ofSeconds(1))
        .build()

	go func() {
		<-ctx.Done()
		globalNotificationSys.ServiceFreeze(ctx, false)
	}()

	keepAliveTicker := time.NewTicker(500 * time.Millisecond)
	defer keepAliveTicker.Stop()

	enc := json.NewEncoder(w)
	ch := objectSpeedTest(ctx, speedTestOpts{
		objectSize:       size,
		concurrencyStart: concurrent,
		duration:         duration,

					// Log if we took a lot of time.
					logger.Info("Site replication healing refresh took %.2fs", took)
				}

				// wait for 200 millisecond, if we are experience lot of I/O
				waitForLowIO(runtime.GOMAXPROCS(0), 200*time.Millisecond, currentHTTPIO)
			}
			healTimer.Reset(siteHealTimeInterval)

		case <-ctx.Done():
			return
		}
	}
}