diff --git a/communicator/config.go b/communicator/config.go
index aebf222..e8d2910 100644
--- a/communicator/config.go
+++ b/communicator/config.go
@@ -28,7 +28,7 @@ func init() {
 
 	flag.IntVar(&communicatePort, "communicate_port", 8088, "http server port. Default is 8088")
 	var cpr float64
-	flag.Float64Var(&cpr, CAPTURE_PACKET_RATE, 1, "capture packet rate. Default is 1.0")
+	flag.Float64Var(&cpr, CAPTURE_PACKET_RATE, 0.01, "capture packet rate. Default is 0.01")
 	_ = catpurePacketRate.setVal(cpr)
 
 	configMap = make(map[string]configItem)
diff --git a/communicator/model.go b/communicator/model.go
index 44ad29e..c1c6a3d 100644
--- a/communicator/model.go
+++ b/communicator/model.go
@@ -32,6 +32,7 @@ func (cprc *capturePacketRateConfig) setVal (val interface{}) (err error){
 		return
 	}
 
+	fmt.Printf("set config %s: %v", CAPTURE_PACKET_RATE, realVal)
 	cprc.mysqlTPR = realVal
 	cprc.tcpTPR = math.Sqrt(realVal)
 	return