Remove XID gauge panel, keep only time series

ansible/roles/grafana/files/dashboards/postgresql.json

@@ -501,56 +501,6 @@
       "title": "Transactions Rate",
       "type": "timeseries"
     },
-    {
-      "datasource": {
-        "type": "prometheus",
-        "uid": "prometheus"
-      },
-      "fieldConfig": {
-        "defaults": {
-          "color": {
-            "mode": "thresholds"
-          },
-          "mappings": [],
-          "max": 200000000,
-          "min": 0,
-          "thresholds": {
-            "mode": "absolute",
-            "steps": [
-              { "color": "green", "value": null },
-              { "color": "yellow", "value": 150000000 },
-              { "color": "red", "value": 180000000 }
-            ]
-          },
-          "unit": "short"
-        }
-      },
-      "gridPos": { "h": 6, "w": 12, "x": 0, "y": 20 },
-      "id": 9,
-      "options": {
-        "minVizHeight": 75,
-        "minVizWidth": 75,
-        "orientation": "horizontal",
-        "reduceOptions": {
-          "calcs": ["lastNotNull"],
-          "fields": "",
-          "values": false
-        },
-        "showThresholdLabels": false,
-        "showThresholdMarkers": true,
-        "sizing": "auto"
-      },
-      "targets": [
-        {
-          "expr": "pg_database_xid_age_xid_age",
-          "legendFormat": "{{datname}}",
-          "refId": "A"
-        }
-      ],
-      "title": "Transaction ID Age (XID Exhaustion Risk)",
-      "description": "Age of oldest unfrozen XID. Approaches 2 billion = wraparound danger. Yellow at 150M, Red at 180M (autovacuum_freeze_max_age default is 200M).",
-      "type": "gauge"
-    },
     {
       "datasource": {
         "type": "prometheus",
@@ -640,5 +590,5 @@
   "timezone": "browser",
   "title": "PostgreSQL",
   "uid": "postgresql",
-  "version": 3
+  "version": 4
 }