diff --git a/files/zfs.conf b/files/zfs.conf
new file mode 100644
index 0000000..b2fd714
--- /dev/null
+++ b/files/zfs.conf
@@ -0,0 +1,4 @@
+# 4GB
+options zfs zfs_arc_max=4294967296
+# 2GB
+options zfs zfs_arc_min=2147483648
diff --git a/setup-zfs-and-lxd.py b/setup-zfs-and-lxd.py
index 8d5bcf1..35efa99 100644
--- a/setup-zfs-and-lxd.py
+++ b/setup-zfs-and-lxd.py
@@ -79,3 +79,17 @@ systemd.service(
     enabled=True,
 )
 
+files.put(
+    name='Push ZFS kernel config',
+    src='files/zfs.conf',
+    dest='/etc/modprobe.d/zfs.conf',
+    user='root',
+    group='root',
+    mode='644',
+)
+
+server.shell(
+    name='Update initramfs',
+    commands=['update-initramfs -u -k all']
+)
+