From 5aa974270c4ee9752ec6bb99d78730a3ad709b57 Mon Sep 17 00:00:00 2001
From: anant-shipit <anantsinghrathore97@gmail.com>
Date: Fri, 17 Jul 2026 18:39:56 +0530
Subject: [PATCH 1/3] feat(dashboard): set Dependency Latency visualization to
 Heatmap (Fixes #97)

---
 .../watchdog_metrics_dashboard.json           | 59 ++++++++++++++++++-
 1 file changed, 56 insertions(+), 3 deletions(-)

diff --git a/grafana/dashboards/watchdog_metrics_dashboard.json b/grafana/dashboards/watchdog_metrics_dashboard.json
index 9929e794..33d4d8f5 100644
--- a/grafana/dashboards/watchdog_metrics_dashboard.json
+++ b/grafana/dashboards/watchdog_metrics_dashboard.json
@@ -134,7 +134,22 @@
       "datasource": {
         "name": "Prometheus"
       },
-      "description": "Metrics: http_outgoing_request_duration_seconds\nQuestion answered: \"Are external dependencies becoming slow?\"",
+      "description": "Metrics: http_outgoing_request_duration_seconds\nQuestion answered: \"Are external dependencies becoming slow?\"\n\nVisualization: Heatmap\nRationale: Latency is a distribution, not a single average. A heatmap visualizes the distribution of request durations over time, making it easy to instantly spot bimodal patterns and long-tail outliers (like degraded downstream servers) that a simple line chart would compress or hide.",
+      "fieldConfig": {
+        "defaults": {
+          "custom": {
+            "hideFrom": {
+              "legend": false,
+              "tooltip": false,
+              "viz": false
+            },
+            "scaleDistribution": {
+              "type": "linear"
+            }
+          }
+        },
+        "overrides": []
+      },
       "gridPos": {
         "h": 8,
         "w": 12,
@@ -142,9 +157,47 @@
         "y": 1
       },
       "id": 102,
+      "options": {
+        "calculate": true,
+        "cellGap": 1,
+        "color": {
+          "exponent": 0.5,
+          "fill": "dark-orange",
+          "mode": "scheme",
+          "reverse": false,
+          "scale": "exponential",
+          "scheme": "Oranges",
+          "steps": 64
+        },
+        "exemplars": {
+          "color": "rgba(255,0,255,0.7)"
+        },
+        "filterValues": {
+          "le": 1e-9
+        },
+        "legend": {
+          "show": true
+        },
+        "rowsFrame": {
+          "layout": "auto"
+        },
+        "tooltip": {
+          "mode": "single",
+          "showColorScale": false,
+          "yHistogram": true
+        },
+        "yAxis": {
+          "axisPlacement": "left",
+          "reverse": false,
+          "unit": "s"
+        }
+      },
+      "pluginVersion": "13.0.2",
       "targets": [
         {
-          "expr": "http_outgoing_request_duration_seconds_sum",
+          "expr": "sum(rate(http_outgoing_request_duration_seconds_bucket{url=~\".*\"}[5m])) by (le)",
+          "format": "heatmap",
+          "legendFormat": "{{le}}",
           "refId": "A",
           "datasource": {
             "name": "Prometheus"
@@ -152,7 +205,7 @@
         }
       ],
       "title": "1.2 Dependency Latency",
-      "type": "timeseries"
+      "type": "heatmap"
     },
     {
       "collapsed": false,

From d93c50188aba5f24314557b9d74a69dd22ece872 Mon Sep 17 00:00:00 2001
From: Anant Singh Rathore <anantsinghrathore97@gmail.com>
Date: Sun, 2 Aug 2026 15:33:11 +0530
Subject: [PATCH 2/3] Update grafana/dashboards/watchdog_metrics_dashboard.json

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
---
 grafana/dashboards/watchdog_metrics_dashboard.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grafana/dashboards/watchdog_metrics_dashboard.json b/grafana/dashboards/watchdog_metrics_dashboard.json
index 33d4d8f5..98d9c57a 100644
--- a/grafana/dashboards/watchdog_metrics_dashboard.json
+++ b/grafana/dashboards/watchdog_metrics_dashboard.json
@@ -195,7 +195,7 @@
       "pluginVersion": "13.0.2",
       "targets": [
         {
-          "expr": "sum(rate(http_outgoing_request_duration_seconds_bucket{url=~\".*\"}[5m])) by (le)",
+          "expr": "sum(rate(http_outgoing_request_duration_seconds_bucket{server_id=~\"$server_id\"}[5m])) by (le)",
           "format": "heatmap",
           "legendFormat": "{{le}}",
           "refId": "A",

From f457357a4b1599999a26c0d69d90d7f3209d561a Mon Sep 17 00:00:00 2001
From: Anant Singh Rathore <anantsinghrathore97@gmail.com>
Date: Tue, 1 Sep 2026 16:09:15 +0530
Subject: [PATCH 3/3] Update grafana/dashboards/watchdog_metrics_dashboard.json

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
---
 grafana/dashboards/watchdog_metrics_dashboard.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grafana/dashboards/watchdog_metrics_dashboard.json b/grafana/dashboards/watchdog_metrics_dashboard.json
index 98d9c57a..7193c9c6 100644
--- a/grafana/dashboards/watchdog_metrics_dashboard.json
+++ b/grafana/dashboards/watchdog_metrics_dashboard.json
@@ -158,7 +158,7 @@
       },
       "id": 102,
       "options": {
-        "calculate": true,
+        "calculate": false,
         "cellGap": 1,
         "color": {
           "exponent": 0.5,