diff --git a/src/common/db/mongoModel.go b/src/common/db/mongoModel.go
index b5748347c..4bc810e16 100644
--- a/src/common/db/mongoModel.go
+++ b/src/common/db/mongoModel.go
@@ -14,7 +14,7 @@ import (
 
 const cChat = "chat"
 const cGroup = "group"
-const singleGocMsgNum = 10000
+const singleGocMsgNum = 5000
 
 type MsgInfo struct {
 	SendTime int64