diff --git a/weed/stats/metrics.go b/weed/stats/metrics.go
index 2912bd34e..4147fd067 100644
--- a/weed/stats/metrics.go
+++ b/weed/stats/metrics.go
@@ -48,20 +48,20 @@ var (
 			Buckets:   prometheus.ExponentialBuckets(0.0001, 2, 24),
 		}, []string{"type"})
 
-	VolumeServerVolumeCounter = prometheus.NewGauge(
+	VolumeServerVolumeCounter = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Namespace: "SeaweedFS",
 			Subsystem: "volumeServer",
 			Name:      "volumes",
-			Help:      "Number of volumes.",
-		})
+			Help:      "Number of volumes or shards.",
+		}, []string{"collection", "type"})
 
-	VolumeServerEcShardCounter = prometheus.NewGauge(
+	VolumeServerMaxVolumeCounter = prometheus.NewGauge(
 		prometheus.GaugeOpts{
 			Namespace: "SeaweedFS",
 			Subsystem: "volumeServer",
-			Name:      "ec_shards",
-			Help:      "Number of EC shards.",
+			Name:      "volumes",
+			Help:      "Maximum number of volumes.",
 		})
 
 	VolumeServerDiskSizeGauge = prometheus.NewGaugeVec(
@@ -81,7 +81,7 @@ func init() {
 	VolumeServerGather.MustRegister(VolumeServerRequestCounter)
 	VolumeServerGather.MustRegister(VolumeServerRequestHistogram)
 	VolumeServerGather.MustRegister(VolumeServerVolumeCounter)
-	VolumeServerGather.MustRegister(VolumeServerEcShardCounter)
+	VolumeServerGather.MustRegister(VolumeServerMaxVolumeCounter)
 	VolumeServerGather.MustRegister(VolumeServerDiskSizeGauge)
 
 }
diff --git a/weed/storage/erasure_coding/ec_shard.go b/weed/storage/erasure_coding/ec_shard.go
index bcfa2c721..b280157b8 100644
--- a/weed/storage/erasure_coding/ec_shard.go
+++ b/weed/storage/erasure_coding/ec_shard.go
@@ -37,7 +37,7 @@ func NewEcVolumeShard(dirname string, collection string, id needle.VolumeId, sha
 	}
 	v.ecdFileSize = ecdFi.Size()
 
-	stats.VolumeServerEcShardCounter.Inc()
+	stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "ec_shards").Inc()
 
 	return
 }
@@ -81,7 +81,7 @@ func (shard *EcVolumeShard) Close() {
 
 func (shard *EcVolumeShard) Destroy() {
 	os.Remove(shard.FileName() + ToExt(int(shard.ShardId)))
-	stats.VolumeServerEcShardCounter.Dec()
+	stats.VolumeServerVolumeCounter.WithLabelValues(shard.Collection, "ec_shards").Inc()
 }
 
 func (shard *EcVolumeShard) ReadAt(buf []byte, offset int64) (int, error) {
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 2d8be7be3..7476de348 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -49,6 +49,7 @@ func NewStore(grpcDialOption grpc.DialOption, port int, ip, publicUrl string, di
 		location := NewDiskLocation(dirnames[i], maxVolumeCounts[i])
 		location.loadExistingVolumes(needleMapKind)
 		s.Locations = append(s.Locations, location)
+		stats.VolumeServerMaxVolumeCounter.Add(float64(maxVolumeCounts[i]))
 	}
 	s.NewVolumesChan = make(chan master_pb.VolumeShortInformationMessage, 3)
 	s.DeletedVolumesChan = make(chan master_pb.VolumeShortInformationMessage, 3)
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index f3d5b9922..a1d9d7e8d 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -103,7 +103,7 @@ func (v *Volume) Close() {
 	if v.dataFile != nil {
 		_ = v.dataFile.Close()
 		v.dataFile = nil
-		stats.VolumeServerVolumeCounter.Dec()
+		stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "volume").Dec()
 	}
 }
 
diff --git a/weed/storage/volume_loading.go b/weed/storage/volume_loading.go
index 4c7b93418..ed1cfe124 100644
--- a/weed/storage/volume_loading.go
+++ b/weed/storage/volume_loading.go
@@ -117,7 +117,7 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 		}
 	}
 
-	stats.VolumeServerVolumeCounter.Inc()
+	stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "volume").Inc()
 
 	return e
 }
diff --git a/weed/storage/volume_vacuum.go b/weed/storage/volume_vacuum.go
index 6e8d3a861..cc7c7d6e6 100644
--- a/weed/storage/volume_vacuum.go
+++ b/weed/storage/volume_vacuum.go
@@ -53,7 +53,7 @@ func (v *Volume) CommitCompact() error {
 		glog.V(0).Infof("fail to close volume %d", v.Id)
 	}
 	v.dataFile = nil
-	stats.VolumeServerVolumeCounter.Dec()
+	stats.VolumeServerVolumeCounter.WithLabelValues(v.Collection, "volume").Inc()
 
 	var e error
 	if e = v.makeupDiff(v.FileName()+".cpd", v.FileName()+".cpx", v.FileName()+".dat", v.FileName()+".idx"); e != nil {