diff --git a/pkg/meta/base.go b/pkg/meta/base.go
index 1537e98c1640..0ca841a2b853 100644
--- a/pkg/meta/base.go
+++ b/pkg/meta/base.go
@@ -174,7 +174,7 @@ type baseMeta struct {
 	usedInodesG prometheus.Gauge
 	txDist      prometheus.Histogram
 	txRestart   prometheus.Counter
-	opDist      prometheus.Histogram
+	opDist      *prometheus.HistogramVec
 
 	en engine
 }
@@ -214,11 +214,11 @@ func newBaseMeta(addr string, conf *Config) *baseMeta {
 			Name: "transaction_restart",
 			Help: "The number of times a transaction is restarted.",
 		}),
-		opDist: prometheus.NewHistogram(prometheus.HistogramOpts{
+		opDist: prometheus.NewHistogramVec(prometheus.HistogramOpts{
 			Name:    "meta_ops_durations_histogram_seconds",
 			Help:    "Operation latency distributions.",
 			Buckets: prometheus.ExponentialBuckets(0.0001, 1.5, 30),
-		}),
+		}, []string{"method"}),
 	}
 }
 
@@ -245,8 +245,8 @@ func (m *baseMeta) InitMetrics(reg prometheus.Registerer) {
 	}()
 }
 
-func (m *baseMeta) timeit(start time.Time) {
-	m.opDist.Observe(time.Since(start).Seconds())
+func (m *baseMeta) timeit(method string, start time.Time) {
+	m.opDist.WithLabelValues(method).Observe(time.Since(start).Seconds())
 }
 
 func (m *baseMeta) getBase() *baseMeta {
@@ -855,7 +855,7 @@ func (m *baseMeta) cleanupSlices() {
 }
 
 func (m *baseMeta) StatFS(ctx Context, ino Ino, totalspace, availspace, iused, iavail *uint64) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("StatFS", time.Now())
 	if st := m.statRootFs(ctx, totalspace, availspace, iused, iavail); st != 0 {
 		return st
 	}
@@ -978,7 +978,7 @@ func (m *baseMeta) Lookup(ctx Context, parent Ino, name string, inode *Ino, attr
 	if inode == nil || attr == nil {
 		return syscall.EINVAL // bad request
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Lookup", time.Now())
 	parent = m.checkRoot(parent)
 	if name == ".." {
 		if parent == m.root {
@@ -1144,7 +1144,7 @@ func (m *baseMeta) GetAttr(ctx Context, inode Ino, attr *Attr) syscall.Errno {
 	if m.conf.OpenCache > 0 && m.of.Check(inode, attr) {
 		return 0
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("GetAttr", time.Now())
 	var err syscall.Errno
 	if inode == RootInode {
 		e := utils.WithTimeout(func() error {
@@ -1206,7 +1206,7 @@ func (m *baseMeta) Mknod(ctx Context, parent Ino, name string, _type uint8, mode
 		return syscall.ENOENT
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Mknod", time.Now())
 	parent = m.checkRoot(parent)
 	var space, inodes int64 = align4K(0), 1
 	if err := m.checkQuota(ctx, space, inodes, parent); err != 0 {
@@ -1264,7 +1264,7 @@ func (m *baseMeta) Link(ctx Context, inode, parent Ino, name string, attr *Attr)
 		return syscall.ENOENT
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Link", time.Now())
 	if attr == nil {
 		attr = &Attr{}
 	}
@@ -1290,7 +1290,7 @@ func (m *baseMeta) ReadLink(ctx Context, inode Ino, path *[]byte) syscall.Errno
 		*path = target.([]byte)
 		return 0
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("ReadLink", time.Now())
 	target, err := m.en.doReadlink(ctx, inode)
 	if err != nil {
 		return errno(err)
@@ -1311,7 +1311,7 @@ func (m *baseMeta) Unlink(ctx Context, parent Ino, name string, skipCheckTrash .
 		return syscall.EROFS
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Unlink", time.Now())
 	parent = m.checkRoot(parent)
 	var attr Attr
 	err := m.en.doUnlink(ctx, parent, name, &attr, skipCheckTrash...)
@@ -1340,7 +1340,7 @@ func (m *baseMeta) Rmdir(ctx Context, parent Ino, name string, skipCheckTrash ..
 		return syscall.EROFS
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Rmdir", time.Now())
 	parent = m.checkRoot(parent)
 	var inode Ino
 	st := m.en.doRmdir(ctx, parent, name, &inode, skipCheckTrash...)
@@ -1377,7 +1377,7 @@ func (m *baseMeta) Rename(ctx Context, parentSrc Ino, nameSrc string, parentDst
 		return syscall.EINVAL
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Rename", time.Now())
 	if inode == nil {
 		inode = new(Ino)
 	}
@@ -1534,7 +1534,7 @@ func (m *baseMeta) Readdir(ctx Context, inode Ino, plus uint8, entries *[]*Entry
 	if err := m.GetAttr(ctx, inode, &attr); err != 0 {
 		return err
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Readdir", time.Now())
 	if inode == m.root {
 		attr.Parent = m.root
 	}
@@ -1561,7 +1561,7 @@ func (m *baseMeta) SetXattr(ctx Context, inode Ino, name string, value []byte, f
 		return syscall.EINVAL
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("SetXattr", time.Now())
 	return m.en.doSetXattr(ctx, m.checkRoot(inode), name, value, flags)
 }
 
@@ -1573,7 +1573,7 @@ func (m *baseMeta) RemoveXattr(ctx Context, inode Ino, name string) syscall.Errn
 		return syscall.EINVAL
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("RemoveXattr", time.Now())
 	return m.en.doRemoveXattr(ctx, m.checkRoot(inode), name)
 }
 
@@ -2221,7 +2221,7 @@ func (m *baseMeta) Clone(ctx Context, srcIno, parent Ino, name string, cmode uin
 		return syscall.ENOENT
 	}
 
-	defer m.timeit(time.Now())
+	defer m.timeit("Clone", time.Now())
 	parent = m.checkRoot(parent)
 
 	var attr Attr
diff --git a/pkg/meta/redis.go b/pkg/meta/redis.go
index f669ba30419a..78fbc3d696de 100644
--- a/pkg/meta/redis.go
+++ b/pkg/meta/redis.go
@@ -755,7 +755,7 @@ func (m *redisMeta) Resolve(ctx Context, parent Ino, path string, inode *Ino, at
 	if len(m.shaResolve) == 0 || m.conf.CaseInsensi || m.prefix != "" {
 		return syscall.ENOTSUP
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Resolve", time.Now())
 	parent = m.checkRoot(parent)
 	args := []string{parent.String(), path,
 		strconv.FormatUint(uint64(ctx.Uid()), 10),
@@ -878,7 +878,7 @@ func (m *redisMeta) txn(ctx Context, txf func(tx *redis.Tx) error, keys ...strin
 }
 
 func (m *redisMeta) Truncate(ctx Context, inode Ino, flags uint8, length uint64, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Truncate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -998,7 +998,7 @@ func (m *redisMeta) Fallocate(ctx Context, inode Ino, mode uint8, off uint64, si
 	if size == 0 {
 		return syscall.EINVAL
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Fallocate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -1077,7 +1077,7 @@ func (m *redisMeta) Fallocate(ctx Context, inode Ino, mode uint8, off uint64, si
 }
 
 func (m *redisMeta) SetAttr(ctx Context, inode Ino, set uint16, sugidclearmode uint8, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("SetAttr", time.Now())
 	inode = m.checkRoot(inode)
 	defer func() { m.of.InvalidateChunk(inode, invalidateAttrOnly) }()
 	return errno(m.txn(ctx, func(tx *redis.Tx) error {
@@ -2111,7 +2111,7 @@ func (m *redisMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) s
 		*slices = ss
 		return 0
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Read", time.Now())
 	vals, err := m.rdb.LRange(ctx, m.chunkKey(inode, indx), 0, -1).Result()
 	if err != nil {
 		return errno(err)
@@ -2129,7 +2129,7 @@ func (m *redisMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) s
 }
 
 func (m *redisMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice Slice) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Write", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -2191,7 +2191,7 @@ func (m *redisMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice
 }
 
 func (m *redisMeta) CopyFileRange(ctx Context, fin Ino, offIn uint64, fout Ino, offOut uint64, size uint64, flags uint32, copied *uint64) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("CopyFileRange", time.Now())
 	f := m.of.find(fout)
 	if f != nil {
 		f.Lock()
@@ -3281,7 +3281,7 @@ func (m *redisMeta) doRepair(ctx Context, inode Ino, attr *Attr) syscall.Errno {
 }
 
 func (m *redisMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("GetXattr", time.Now())
 	inode = m.checkRoot(inode)
 	var err error
 	*vbuff, err = m.rdb.HGet(ctx, m.xattrKey(inode), name).Bytes()
@@ -3292,7 +3292,7 @@ func (m *redisMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte)
 }
 
 func (m *redisMeta) ListXattr(ctx Context, inode Ino, names *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("ListXattr", time.Now())
 	inode = m.checkRoot(inode)
 	vals, err := m.rdb.HKeys(ctx, m.xattrKey(inode)).Result()
 	if err != nil {
diff --git a/pkg/meta/sql.go b/pkg/meta/sql.go
index dfdc6362eacf..b6a9847e6c96 100644
--- a/pkg/meta/sql.go
+++ b/pkg/meta/sql.go
@@ -867,7 +867,7 @@ func clearSUGIDSQL(ctx Context, cur *node, set *Attr) {
 }
 
 func (m *dbMeta) SetAttr(ctx Context, inode Ino, set uint16, sugidclearmode uint8, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("SetAttr", time.Now())
 	inode = m.checkRoot(inode)
 	defer func() { m.of.InvalidateChunk(inode, invalidateAttrOnly) }()
 	return errno(m.txn(func(s *xorm.Session) error {
@@ -958,7 +958,7 @@ func (m *dbMeta) appendSlice(s *xorm.Session, inode Ino, indx uint32, buf []byte
 }
 
 func (m *dbMeta) Truncate(ctx Context, inode Ino, flags uint8, length uint64, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Truncate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -1051,7 +1051,7 @@ func (m *dbMeta) Fallocate(ctx Context, inode Ino, mode uint8, off uint64, size
 	if size == 0 {
 		return syscall.EINVAL
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Fallocate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -2060,7 +2060,7 @@ func (m *dbMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) sysc
 		*slices = ss
 		return 0
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Read", time.Now())
 	var c = chunk{Inode: inode, Indx: indx}
 	err := m.roTxn(func(s *xorm.Session) error {
 		_, err := s.MustCols("indx").Get(&c)
@@ -2082,7 +2082,7 @@ func (m *dbMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) sysc
 }
 
 func (m *dbMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice Slice) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Write", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -2152,7 +2152,7 @@ func (m *dbMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice Sl
 }
 
 func (m *dbMeta) CopyFileRange(ctx Context, fin Ino, offIn uint64, fout Ino, offOut uint64, size uint64, flags uint32, copied *uint64) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("CopyFileRange", time.Now())
 	f := m.of.find(fout)
 	if f != nil {
 		f.Lock()
@@ -2962,7 +2962,7 @@ func (m *dbMeta) doRepair(ctx Context, inode Ino, attr *Attr) syscall.Errno {
 }
 
 func (m *dbMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("GetXattr", time.Now())
 	inode = m.checkRoot(inode)
 	return errno(m.roTxn(func(s *xorm.Session) error {
 		var x = xattr{Inode: inode, Name: name}
@@ -2979,7 +2979,7 @@ func (m *dbMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) sy
 }
 
 func (m *dbMeta) ListXattr(ctx Context, inode Ino, names *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("ListXattr", time.Now())
 	inode = m.checkRoot(inode)
 	return errno(m.roTxn(func(s *xorm.Session) error {
 		var xs []xattr
diff --git a/pkg/meta/tkv.go b/pkg/meta/tkv.go
index b1a218a40a9c..f4e8cde9bef4 100644
--- a/pkg/meta/tkv.go
+++ b/pkg/meta/tkv.go
@@ -843,7 +843,7 @@ func (m *kvMeta) doGetAttr(ctx Context, inode Ino, attr *Attr) syscall.Errno {
 }
 
 func (m *kvMeta) SetAttr(ctx Context, inode Ino, set uint16, sugidclearmode uint8, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("SetAttr", time.Now())
 	inode = m.checkRoot(inode)
 	defer func() { m.of.InvalidateChunk(inode, invalidateAttrOnly) }()
 	return errno(m.txn(func(tx *kvTxn) error {
@@ -918,7 +918,7 @@ func (m *kvMeta) SetAttr(ctx Context, inode Ino, set uint16, sugidclearmode uint
 }
 
 func (m *kvMeta) Truncate(ctx Context, inode Ino, flags uint8, length uint64, attr *Attr) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Truncate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -1003,7 +1003,7 @@ func (m *kvMeta) Fallocate(ctx Context, inode Ino, mode uint8, off uint64, size
 	if size == 0 {
 		return syscall.EINVAL
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Fallocate", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -1814,7 +1814,7 @@ func (m *kvMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) sysc
 		*slices = ss
 		return 0
 	}
-	defer m.timeit(time.Now())
+	defer m.timeit("Read", time.Now())
 	val, err := m.get(m.chunkKey(inode, indx))
 	if err != nil {
 		return errno(err)
@@ -1832,7 +1832,7 @@ func (m *kvMeta) Read(ctx Context, inode Ino, indx uint32, slices *[]Slice) sysc
 }
 
 func (m *kvMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice Slice) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("Write", time.Now())
 	f := m.of.find(inode)
 	if f != nil {
 		f.Lock()
@@ -1882,7 +1882,7 @@ func (m *kvMeta) Write(ctx Context, inode Ino, indx uint32, off uint32, slice Sl
 }
 
 func (m *kvMeta) CopyFileRange(ctx Context, fin Ino, offIn uint64, fout Ino, offOut uint64, size uint64, flags uint32, copied *uint64) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("CopyFileRange", time.Now())
 	var newLength, newSpace int64
 	f := m.of.find(fout)
 	if f != nil {
@@ -2588,7 +2588,7 @@ func (m *kvMeta) doRepair(ctx Context, inode Ino, attr *Attr) syscall.Errno {
 }
 
 func (m *kvMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("GetXattr", time.Now())
 	inode = m.checkRoot(inode)
 	buf, err := m.get(m.xattrKey(inode, name))
 	if err != nil {
@@ -2602,7 +2602,7 @@ func (m *kvMeta) GetXattr(ctx Context, inode Ino, name string, vbuff *[]byte) sy
 }
 
 func (m *kvMeta) ListXattr(ctx Context, inode Ino, names *[]byte) syscall.Errno {
-	defer m.timeit(time.Now())
+	defer m.timeit("ListXattr", time.Now())
 	inode = m.checkRoot(inode)
 	keys, err := m.scanKeys(m.xattrKey(inode, ""))
 	if err != nil {
diff --git a/pkg/vfs/internal.go b/pkg/vfs/internal.go
index f21cea98870f..5722e11185a5 100644
--- a/pkg/vfs/internal.go
+++ b/pkg/vfs/internal.go
@@ -163,8 +163,14 @@ func collectMetrics(registry *prometheus.Registry) []byte {
 		return strconv.FormatFloat(v, 'f', -1, 64)
 	}
 	for _, mf := range mfs {
+		var name = *mf.Name
+		if name == "juicefs_meta_ops_durations_histogram_seconds" && *mf.Type == io_prometheus_client.MetricType_HISTOGRAM {
+			total, sum := mergeHistogramMetrics(mf)
+			_, _ = fmt.Fprintf(w, "%s_total %d\n", name, total)
+			_, _ = fmt.Fprintf(w, "%s_sum %s\n", name, format(sum))
+			continue
+		}
 		for _, m := range mf.Metric {
-			var name string = *mf.Name
 			for _, l := range m.Label {
 				if *l.Name != "mp" && *l.Name != "vol_name" {
 					name += "_" + *l.Value
@@ -185,6 +191,16 @@ func collectMetrics(registry *prometheus.Registry) []byte {
 	return w.Bytes()
 }
 
+func mergeHistogramMetrics(mf *io_prometheus_client.MetricFamily) (uint64, float64) {
+	var total uint64
+	var sum float64
+	for _, metric := range mf.Metric {
+		total += metric.Histogram.GetSampleCount()
+		sum += metric.Histogram.GetSampleSum()
+	}
+	return total, sum
+}
+
 func writeProgress(item1, item2 *uint64, out io.Writer, done chan struct{}) {
 	wb := utils.NewBuffer(17)
 	wb.Put8(meta.CPROGRESS)