diff --git a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
index 077c43a39dfb075429f574b5221e6caf8d419360..6eeeb226fd7d68e167ea59d3a0883c2438d728d4 100644
--- a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
+++ b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
@@ -370,7 +370,12 @@
       "pluginVersion": "8.3.5",
       "targets": [
         {
-          "expr": "1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes",
+          "datasource": {
+            "type": "prometheus",
+            "uid": "000000001"
+          },
+          "exemplar": true,
+          "expr": "1 - (node_memory_MemAvailable_bytes + node_zfs_arc_size) / node_memory_MemTotal_bytes",
           "interval": "",
           "intervalFactor": 4,
           "legendFormat": "{{instance}}",
@@ -1813,7 +1818,7 @@
       "type": "timeseries"
     }
   ],
-  "refresh": false,
+  "refresh": "",
   "schemaVersion": 35,
   "style": "dark",
   "tags": [],