diff --git a/modules/nixos/tmpsys.nix b/modules/nixos/tmpsys.nix
index a324c30..6a9d32b 100644
--- a/modules/nixos/tmpsys.nix
+++ b/modules/nixos/tmpsys.nix
@@ -9,7 +9,7 @@
   fileSystems."/" = lib.mkForce {
     device = "none";
     fsType = "tmpfs";
-    options = [ "defaults" "size=2G" "mode=755" ];
+    options = [ "relatime"  "mode=755" ];
   };
 
    # 将 /nix 目录绑定到持久化存储