diff --git a/etc/modprobe.d/zfs.conf b/etc/modprobe.d/zfs.conf
new file mode 100644
index 0000000..1268449
--- /dev/null
+++ b/etc/modprobe.d/zfs.conf
@@ -0,0 +1 @@
+options zfs zfs_arc_max=8589934592
\ No newline at end of file
diff --git a/etc/systemd/system/matrix-synapse.service.d/override.conf b/etc/systemd/system/matrix-synapse.service.d/override.conf
index 7eeaf0e..6c3edf7 100644
--- a/etc/systemd/system/matrix-synapse.service.d/override.conf
+++ b/etc/systemd/system/matrix-synapse.service.d/override.conf
@@ -30,4 +30,7 @@ PrivateDevices=true
 # - Hostname
 # - System Clock
 ProtectSystem=strict
-ProtectKernelTunables=true
\ No newline at end of file
+ProtectKernelTunables=true
+
+MemoryHigh=32G
+MemoryMax=40G