diff --git a/internal/util/paramtable/component_param.go b/internal/util/paramtable/component_param.go
index 21cfd211fa..e3cbb7e349 100644
--- a/internal/util/paramtable/component_param.go
+++ b/internal/util/paramtable/component_param.go
@@ -31,7 +31,7 @@ const (
 	DefaultRetentionDuration = 3600 * 24 * 5
 
 	// DefaultIndexSliceSize defines the default slice size of index file when serializing.
-	DefaultIndexSliceSize = 4
+	DefaultIndexSliceSize = 16
 )
 
 // ComponentParam is used to quickly and easily access all components' configurations.