anchor.diff:        ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
       '';
     };
  +
  +  # Enable zram to have better memory management.
  +  zramSwap = {
  +    enable = true;
  +    algorithm = "zstd";
  +  };
   }
  
positive.code:       interval = "weekly";
      };
  
      # Decrease journal size
      journald.extraConfig = ''
        SystemMaxUse=500M
      '';
  
negative.code:     LC_COLLATE = "C"; # Use C style string sort.
    };
  
    # Increase file handler limit.
    security.pam.loginLimits = [{
      domain = "*";
  