diff --git a/pkg/middle-msg/logx.go b/pkg/middle-msg/logx.go
index 90b2340..1dd9fe1 100644
--- a/pkg/middle-msg/logx.go
+++ b/pkg/middle-msg/logx.go
@@ -3,7 +3,7 @@ package middle_msg
 import "time"
 
 var (
-	EventNameLog = "logcontext"
+	EventNameLog = "log-context"
 )
 
 type LogContext struct {
diff --git a/pkg/middle-msg/lru.go b/pkg/middle-msg/lru.go
index b5aa092..b566510 100644
--- a/pkg/middle-msg/lru.go
+++ b/pkg/middle-msg/lru.go
@@ -1,3 +1,14 @@
 package middle_msg
 
+import "time"
 
+var LruCleanContextName = "lru-clean-context"
+
+type LruCleanContext struct {
+	Keys            []string
+	BeforeCleanSize int64
+	BehindCleanSize int64
+
+	StartTime time.Duration
+	EndTime   time.Duration
+}