From 7fdc067bdc59fbc8cea3145ea105d9c9a56b079b Mon Sep 17 00:00:00 2001
From: Seth Etter <mail@sethetter.com>
Date: Sun, 30 Aug 2026 22:04:19 -0500
Subject: [PATCH] observability: memory panel shows total vs used, gap =
 available

---
 .../files/dashboards/boards/host-overview.json         | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/observability/ansible/roles/svc-grafana/files/dashboards/boards/host-overview.json b/observability/ansible/roles/svc-grafana/files/dashboards/boards/host-overview.json
index d8f5b59..26dcddb 100644
--- a/observability/ansible/roles/svc-grafana/files/dashboards/boards/host-overview.json
+++ b/observability/ansible/roles/svc-grafana/files/dashboards/boards/host-overview.json
@@ -116,8 +116,8 @@
     {
       "id": 4,
       "type": "timeseries",
-      "title": "Memory used / available",
-      "description": "Used = total minus available. Available is the kernel's reclaim-aware estimate.",
+      "title": "Memory used / total",
+      "description": "The gap between the two lines is available memory.",
       "datasource": { "type": "prometheus", "uid": "mimir" },
       "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
       "fieldConfig": {
@@ -133,7 +133,7 @@
         },
         "overrides": [
           {
-            "matcher": { "id": "byRegexp", "options": ".* available" },
+            "matcher": { "id": "byRegexp", "options": ".* total" },
             "properties": [
               { "id": "custom.lineStyle", "value": { "dash": [10, 10], "fill": "dash" } },
               { "id": "custom.fillOpacity", "value": 0 }
@@ -150,8 +150,8 @@
         },
         {
           "refId": "B",
-          "expr": "node_memory_MemAvailable_bytes{host=~\"$host\"}",
-          "legendFormat": "{{host}} available"
+          "expr": "node_memory_MemTotal_bytes{host=~\"$host\"}",
+          "legendFormat": "{{host}} total"
         }
       ]
     },
-- 
2.51.2