diff --git a/common/logger.go b/common/logger.go
index d3ec266..c5e8cac 100644
--- a/common/logger.go
+++ b/common/logger.go
@@ -25,15 +25,16 @@ func InitLogger() {
 		}
 	}
 	consoleH := handler.NewConsoleHandler(logLevels)
-	fileH, err := handler.NewTimeRotateFile(
-		logFilePath,
-		rotatefile.EveryDay,
-		handler.WithLogLevels(slog.AllLevels),
-		handler.WithBackupNum(logBackupNum),
-		handler.WithBuffSize(0),
-	)
-	if err != nil {
-		panic(err)
+	Log.AddHandler(consoleH)
+	if logFilePath != "" && logBackupNum > 0 {
+		fileH, err := handler.NewTimeRotateFile(
+			logFilePath,
+			rotatefile.EveryDay,
+			handler.WithLogLevels(slog.AllLevels),
+			handler.WithBackupNum(logBackupNum))
+		if err != nil {
+			panic(err)
+		}
+		Log.AddHandler(fileH)
 	}
-	Log.AddHandlers(consoleH, fileH)
 }
diff --git a/config/viper.go b/config/viper.go
index 33bff77..112f878 100644
--- a/config/viper.go
+++ b/config/viper.go
@@ -90,11 +90,9 @@ func Init() error {
 	viper.SetDefault("telegram.rpc_retry", 5)
 
 	viper.SetDefault("temp.base_path", "cache/")
-	viper.SetDefault("temp.cache_ttl", 3600)
+	viper.SetDefault("temp.cache_ttl", 30)
 
 	viper.SetDefault("log.level", "INFO")
-	viper.SetDefault("log.file", "logs/saveany.log")
-	viper.SetDefault("log.backup_count", 7)
 
 	viper.SetDefault("db.path", "data/saveany.db")
 	viper.SetDefault("db.session", "data/session.db")