// and sends to given channel
func httpMetricsPrometheus(ch chan<- prometheus.Metric) {
	httpStats := globalHTTPStats.toServerHTTPStats(true)

	for api, value := range httpStats.CurrentS3Requests.APIStats {
		ch <- prometheus.MustNewConstMetric(
			prometheus.NewDesc(
				prometheus.BuildFQName(s3Namespace, "requests", "current"),
				"Total number of running s3 requests in current MinIO server instance",