diff --git a/config/my.cnf b/config/my.cnf
index 746d79d..63177db 100644
--- a/config/my.cnf
+++ b/config/my.cnf
@@ -27,3 +27,7 @@ default-character-set=utf8mb4
 #default-character-set=utf8
 
 default-character-set=utf8mb4
+
+#group_concat_max_len=1024
+#group_concat_max_len=10240
+group_concat_max_len=-1