diff --git a/weed/stats/metrics.go b/weed/stats/metrics.go
index fccf64d19..2408b607a 100644
--- a/weed/stats/metrics.go
+++ b/weed/stats/metrics.go
@@ -63,6 +63,20 @@ var (
 			Name:      "ecShards",
 			Help:      "Number of EC shards.",
 		})
+	VolumeServerVolumeSizeGauge = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "totalVolumeSize",
+			Help:      "Actual disk size used by volumes.",
+		})
+	VolumeServerEcShardSizeGauge = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: "SeaweedFS",
+			Subsystem: "volumeServer",
+			Name:      "totalEcShardSize",
+			Help:      "Actual disk size used by ec shards.",
+		})
 )
 
 func init() {
@@ -74,6 +88,8 @@ func init() {
 	VolumeServerGather.MustRegister(VolumeServerRequestHistogram)
 	VolumeServerGather.MustRegister(VolumeServerVolumeCounter)
 	VolumeServerGather.MustRegister(VolumeServerEcShardCounter)
+	VolumeServerGather.MustRegister(VolumeServerVolumeSizeGauge)
+	VolumeServerGather.MustRegister(VolumeServerEcShardSizeGauge)
 
 }
 
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 2138041a4..1f1337e59 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	. "github.com/chrislusf/seaweedfs/weed/storage/types"
 	"google.golang.org/grpc"
@@ -161,6 +162,7 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 	var volumeMessages []*master_pb.VolumeInformationMessage
 	maxVolumeCount := 0
 	var maxFileKey NeedleId
+	var totalVolumeSize uint64
 	for _, location := range s.Locations {
 		maxVolumeCount = maxVolumeCount + location.MaxVolumeCount
 		location.Lock()
@@ -178,9 +180,12 @@ func (s *Store) CollectHeartbeat() *master_pb.Heartbeat {
 					glog.V(0).Infoln("volume", v.Id, "is expired.")
 				}
 			}
+			fileSize, _, _ := v.FileStat()
+			totalVolumeSize += fileSize
 		}
 		location.Unlock()
 	}
+	stats.VolumeServerVolumeSizeGauge.Set(float64(totalVolumeSize))
 
 	return &master_pb.Heartbeat{
 		Ip:             s.Ip,
diff --git a/weed/storage/store_ec.go b/weed/storage/store_ec.go
index fb7735263..d5e361041 100644
--- a/weed/storage/store_ec.go
+++ b/weed/storage/store_ec.go
@@ -12,6 +12,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/klauspost/reedsolomon"
@@ -19,14 +20,21 @@ import (
 
 func (s *Store) CollectErasureCodingHeartbeat() *master_pb.Heartbeat {
 	var ecShardMessages []*master_pb.VolumeEcShardInformationMessage
+	var totalEcShardSize int64
 	for _, location := range s.Locations {
 		location.ecVolumesLock.RLock()
 		for _, ecShards := range location.ecVolumes {
 			ecShardMessages = append(ecShardMessages, ecShards.ToVolumeEcShardInformationMessage()...)
+
+			for _, ecShard := range ecShards.Shards {
+				totalEcShardSize += ecShard.Size()
+			}
 		}
 		location.ecVolumesLock.RUnlock()
 	}
 
+	stats.VolumeServerEcShardSizeGauge.Set(float64(totalEcShardSize))
+
 	return &master_pb.Heartbeat{
 		EcShards:      ecShardMessages,
 		HasNoEcShards: len(ecShardMessages) == 0,