diff --git a/weed/command/filer.go b/weed/command/filer.go
index 96df0d7dd..7ff9fcd9a 100644
--- a/weed/command/filer.go
+++ b/weed/command/filer.go
@@ -13,6 +13,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/server"
+	stats_collect "github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -86,6 +87,8 @@ func runFiler(cmd *Command, args []string) bool {
 
 	util.LoadConfiguration("security", false)
 
+	go stats_collect.StartMetricsServer(*f.metricsHttpPort)
+
 	f.startFiler()
 
 	return true
@@ -124,7 +127,6 @@ func (fo *FilerOptions) startFiler() {
 		Port:               uint32(*fo.port),
 		Cipher:             *fo.cipher,
 		Filers:             peers,
-		MetricsHttpPort:    *fo.metricsHttpPort,
 	})
 	if nfs_err != nil {
 		glog.Fatalf("Filer startup error: %v", nfs_err)
diff --git a/weed/command/s3.go b/weed/command/s3.go
index fb09731fa..e94decaf3 100644
--- a/weed/command/s3.go
+++ b/weed/command/s3.go
@@ -115,6 +115,8 @@ func runS3(cmd *Command, args []string) bool {
 
 	util.LoadConfiguration("security", false)
 
+	go stats_collect.StartMetricsServer(*s3StandaloneOptions.metricsHttpPort)
+
 	return s3StandaloneOptions.startS3Server()
 
 }
@@ -155,8 +157,7 @@ func (s3opt *S3Options) startS3Server() bool {
 		}
 	}
 
-	go stats_collect.StartMetricsServer(stats_collect.S3Gather, *s3opt.metricsHttpPort)
-	go stats_collect.LoopPushingMetric("s3", stats_collect.SourceName(uint32(*s3opt.port)), stats_collect.S3Gather, metricsAddress, metricsIntervalSec)
+	go stats_collect.LoopPushingMetric("s3", stats_collect.SourceName(uint32(*s3opt.port)), metricsAddress, metricsIntervalSec)
 
 	router := mux.NewRouter().SkipClean(true)
 
diff --git a/weed/command/server.go b/weed/command/server.go
index 6f671363c..91d8d22c6 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -2,6 +2,7 @@ package command
 
 import (
 	"fmt"
+	stats_collect "github.com/chrislusf/seaweedfs/weed/stats"
 	"os"
 	"runtime"
 	"runtime/pprof"
@@ -151,11 +152,6 @@ func runServer(cmd *Command, args []string) bool {
 	serverOptions.v.rack = serverRack
 	msgBrokerOptions.ip = serverIp
 
-	// metrics port
-	filerOptions.metricsHttpPort = serverMetricsHttpPort
-	serverOptions.v.metricsHttpPort = serverMetricsHttpPort
-	s3Options.metricsHttpPort = serverMetricsHttpPort
-
 	// serverOptions.v.pulseSeconds = pulseSeconds
 	// masterOptions.pulseSeconds = pulseSeconds
 
@@ -174,6 +170,7 @@ func runServer(cmd *Command, args []string) bool {
 	}
 
 	runtime.GOMAXPROCS(runtime.NumCPU())
+	go stats_collect.StartMetricsServer(*serverMetricsHttpPort)
 
 	folders := strings.Split(*volumeDataFolders, ",")
 
diff --git a/weed/command/volume.go b/weed/command/volume.go
index 82f2658c3..dfc649ba5 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -25,6 +25,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 	"github.com/chrislusf/seaweedfs/weed/server"
+	stats_collect "github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -111,6 +112,8 @@ func runVolume(cmd *Command, args []string) bool {
 		grace.SetupProfiling(*v.cpuProfile, *v.memProfile)
 	}
 
+	go stats_collect.StartMetricsServer(*v.metricsHttpPort)
+
 	v.startVolumeServer(*volumeFolders, *maxVolumeCounts, *volumeWhiteListOption, *minFreeSpacePercent)
 
 	return true
@@ -209,7 +212,6 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 		*v.fixJpgOrientation, *v.readRedirect,
 		*v.compactionMBPerSecond,
 		*v.fileSizeLimitMB,
-		*v.metricsHttpPort,
 	)
 	// starting grpc server
 	grpcS := v.startGrpcService(volumeServer)
diff --git a/weed/server/filer_server.go b/weed/server/filer_server.go
index de271a483..ec0a4fb3e 100644
--- a/weed/server/filer_server.go
+++ b/weed/server/filer_server.go
@@ -54,7 +54,6 @@ type FilerOption struct {
 	recursiveDelete    bool
 	Cipher             bool
 	Filers             []string
-	MetricsHttpPort    int
 }
 
 type FilerServer struct {
@@ -158,8 +157,7 @@ func (fs *FilerServer) maybeStartMetrics() {
 		}
 	}
 
-	go stats.StartMetricsServer(stats.FilerGather, fs.option.MetricsHttpPort)
-	go stats.LoopPushingMetric("filer", stats.SourceName(fs.option.Port), stats.FilerGather, fs.metricsAddress, fs.metricsIntervalSec)
+	go stats.LoopPushingMetric("filer", stats.SourceName(fs.option.Port), fs.metricsAddress, fs.metricsIntervalSec)
 }
 
 func readFilerConfiguration(grpcDialOption grpc.DialOption, masterAddress string) (metricsAddress string, metricsIntervalSec int, err error) {
diff --git a/weed/server/volume_server.go b/weed/server/volume_server.go
index 2a9097f01..83df32fdd 100644
--- a/weed/server/volume_server.go
+++ b/weed/server/volume_server.go
@@ -46,7 +46,6 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	readRedirect bool,
 	compactionMBPerSecond int,
 	fileSizeLimitMB int,
-	metricsHttpPort int,
 ) *VolumeServer {
 
 	v := util.GetViper()
@@ -98,8 +97,7 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	}
 
 	go vs.heartbeat()
-	go stats.StartMetricsServer(stats.VolumeServerGather, metricsHttpPort)
-	go stats.LoopPushingMetric("volumeServer", fmt.Sprintf("%s:%d", ip, port), stats.VolumeServerGather, vs.metricsAddress, vs.metricsIntervalSec)
+	go stats.LoopPushingMetric("volumeServer", fmt.Sprintf("%s:%d", ip, port), vs.metricsAddress, vs.metricsIntervalSec)
 
 	return vs
 }
diff --git a/weed/stats/metrics.go b/weed/stats/metrics.go
index 5326622bd..d930caf0f 100644
--- a/weed/stats/metrics.go
+++ b/weed/stats/metrics.go
@@ -16,9 +16,7 @@ import (
 )
 
 var (
-	FilerGather        = prometheus.NewRegistry()
-	VolumeServerGather = prometheus.NewRegistry()
-	S3Gather           = prometheus.NewRegistry()
+	Gather        = prometheus.NewRegistry()
 
 	FilerRequestCounter = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
@@ -114,23 +112,23 @@ var (
 
 func init() {
 
-	FilerGather.MustRegister(FilerRequestCounter)
-	FilerGather.MustRegister(FilerRequestHistogram)
-	FilerGather.MustRegister(FilerStoreCounter)
-	FilerGather.MustRegister(FilerStoreHistogram)
-	FilerGather.MustRegister(prometheus.NewGoCollector())
+	Gather.MustRegister(FilerRequestCounter)
+	Gather.MustRegister(FilerRequestHistogram)
+	Gather.MustRegister(FilerStoreCounter)
+	Gather.MustRegister(FilerStoreHistogram)
+	Gather.MustRegister(prometheus.NewGoCollector())
 
-	VolumeServerGather.MustRegister(VolumeServerRequestCounter)
-	VolumeServerGather.MustRegister(VolumeServerRequestHistogram)
-	VolumeServerGather.MustRegister(VolumeServerVolumeCounter)
-	VolumeServerGather.MustRegister(VolumeServerMaxVolumeCounter)
-	VolumeServerGather.MustRegister(VolumeServerDiskSizeGauge)
+	Gather.MustRegister(VolumeServerRequestCounter)
+	Gather.MustRegister(VolumeServerRequestHistogram)
+	Gather.MustRegister(VolumeServerVolumeCounter)
+	Gather.MustRegister(VolumeServerMaxVolumeCounter)
+	Gather.MustRegister(VolumeServerDiskSizeGauge)
 
-	S3Gather.MustRegister(S3RequestCounter)
-	S3Gather.MustRegister(S3RequestHistogram)
+	Gather.MustRegister(S3RequestCounter)
+	Gather.MustRegister(S3RequestHistogram)
 }
 
-func LoopPushingMetric(name, instance string, gatherer *prometheus.Registry, addr string, intervalSeconds int) {
+func LoopPushingMetric(name, instance, addr string, intervalSeconds int) {
 
 	if addr == "" || intervalSeconds == 0 {
 		return
@@ -138,7 +136,7 @@ func LoopPushingMetric(name, instance string, gatherer *prometheus.Registry, add
 
 	glog.V(0).Infof("%s server sends metrics to %s every %d seconds", name, addr, intervalSeconds)
 
-	pusher := push.New(addr, name).Gatherer(gatherer).Grouping("instance", instance)
+	pusher := push.New(addr, name).Gatherer(Gather).Grouping("instance", instance)
 
 	for {
 		err := pusher.Push()
@@ -153,11 +151,11 @@ func LoopPushingMetric(name, instance string, gatherer *prometheus.Registry, add
 	}
 }
 
-func StartMetricsServer(gatherer *prometheus.Registry, port int) {
+func StartMetricsServer(port int) {
 	if port == 0 {
 		return
 	}
-	http.Handle("/metrics", promhttp.HandlerFor(gatherer, promhttp.HandlerOpts{}))
+	http.Handle("/metrics", promhttp.HandlerFor(Gather, promhttp.HandlerOpts{}))
 	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), nil))
 }