diff --git a/metric/metric.go b/metric/metric.go
index f25d7a5..2b17129 100644
--- a/metric/metric.go
+++ b/metric/metric.go
@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"math"
 	"os"
+	"sync/atomic"
 
 	"repositories.action2quare.com/ayo/gocommon/logger"
 )
@@ -34,8 +35,8 @@ type MetricDescription struct {
 }
 
 type writeRequest struct {
-	key string
-	val float64
+	key     string
+	valfunc func() float64
 }
 
 type metricCollection struct {
@@ -46,7 +47,38 @@ var mc = metricCollection{
 	writerChan: make(chan *writeRequest, 100),
 }
 
-type MetricWriter func(float64)
+type MetricWriter interface {
+	Add(int64)
+	Set(int64)
+}
+
+type metric_empty struct{}
+
+func (mw *metric_empty) Set(newval int64) {}
+func (mw *metric_empty) Add(inc int64)    {}
+
+type metric_int64 struct {
+	valptr     *int64
+	key        string
+	writerChan chan *writeRequest
+}
+
+func (mw *metric_int64) requestMetricWrite() {
+	mw.writerChan <- &writeRequest{
+		key:     mw.key,
+		valfunc: func() float64 { return float64(atomic.LoadInt64(mw.valptr)) },
+	}
+}
+
+func (mw *metric_int64) Set(newval int64) {
+	atomic.StoreInt64(mw.valptr, newval)
+	mw.requestMetricWrite()
+}
+
+func (mw *metric_int64) Add(inc int64) {
+	atomic.AddInt64(mw.valptr, inc)
+	mw.requestMetricWrite()
+}
 
 func (mc *metricCollection) metricWriter() {
 	// head + metric_key_size + 8byte + tail + cr = 19
@@ -57,7 +89,7 @@ func (mc *metricCollection) metricWriter() {
 
 	for req := range mc.writerChan {
 		copy(buff[1:], []byte(req.key))
-		binary.BigEndian.PutUint64(buff[9:], math.Float64bits(req.val))
+		binary.BigEndian.PutUint64(buff[9:], math.Float64bits(req.valfunc()))
 		os.Stdout.Write(buff[:])
 	}
 }
@@ -66,7 +98,7 @@ var NewMetric func(MetricType, string, string, map[string]string) MetricWriter
 
 func init() {
 	NewMetric = func(MetricType, string, string, map[string]string) MetricWriter {
-		return func(val float64) {}
+		return &metric_empty{}
 	}
 
 	ppid := os.Getppid()
@@ -101,11 +133,9 @@ func newMetricImpl(mt MetricType, name string, help string, constLabels map[stri
 		ConstLabels: constLabels,
 	})
 
-	writer = func(val float64) {
-		mc.writerChan <- &writeRequest{
-			key: key,
-			val: val,
-		}
+	writer = &metric_int64{
+		key:        key,
+		writerChan: mc.writerChan,
 	}
 
 	output := append([]byte{METRIC_HEAD_INLINE}, temp...)