share/common.nix

@@ -114,9 +114,12 @@ in
 
   # tweak ZFS
   boot.extraModprobeConfig = ''
-    options zfs zfs_arc_meta_limit_percent=100
+    options zfs zfetch_max_distance=268435456
+    options zfs zfs_arc_meta_limit_percent=75
     options zfs zfs_arc_min=134217728
     options zfs zfs_arc_max=4294967296
+    options zfs zfs_compressed_arc_enabled=0
+    options zfs zfs_abd_scatter_enabled=0
     options zfs zfs_txg_timeout=30
     options zfs zfs_vdev_scrub_min_active=1
     options zfs zfs_vdev_scrub_max_active=1
@@ -131,18 +134,6 @@ in
     options zfs zfs_vdev_def_queue_depth=128
   '';
 
-  # tune the ZFS pool for NVMe
-  system.activationScripts.zfsTuning = {
-    text = ''
-      # only one level of metadata caching
-      ${pkgs.zfs}/bin/zfs set primarycache=metadata zpool
-      ${pkgs.zfs}/bin/zfs set secondarycache=none zpool
-
-      # use always direct IO to avoid ARC overhead
-      ${pkgs.zfs}/bin/zfs set direct=always zpool
-    '';
-  };
-
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;