From 8aba92e44489e798a792abe1faafbfd29f73b5e1 Mon Sep 17 00:00:00 2001
From: Chris Raible <chris@ghost.org>
Date: Thu, 7 Nov 2024 10:18:41 -0800
Subject: [PATCH] Fixed CPU Usage chart in grafana dashboard (#21568)
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ref
https://linear.app/ghost/issue/ENG-1505/start-monitoring-ghosts-constraints-and-our-3-goals-using-prometheus

- Using `irate` for aggregating CPU usage was resulting in some strange
behavior — the CPU Usage chart would zero out after a few mins of
running. Switching to regular `rate` seems to have fixed the issue
completely.
---
 .github/scripts/grafana/dashboards/main-dashboard.json | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/scripts/grafana/dashboards/main-dashboard.json b/.github/scripts/grafana/dashboards/main-dashboard.json
index 5ddb81dab5..a1347c8d1c 100644
--- a/.github/scripts/grafana/dashboards/main-dashboard.json
+++ b/.github/scripts/grafana/dashboards/main-dashboard.json
@@ -312,19 +312,19 @@
         "steppedLine": false,
         "targets": [
           {
-            "expr": "irate(ghost_process_cpu_user_seconds_total{job=~\"$job\"}[1m]) * 100",
+            "expr": "rate(ghost_process_cpu_user_seconds_total{job=~\"$job\"}[1m]) * 100",
             "interval": "",
             "legendFormat": "User CPU - {{job}}",
             "refId": "A"
           },
           {
-            "expr": "irate(ghost_process_cpu_system_seconds_total{job=~\"$job\"}[1m]) * 100",
+            "expr": "rate(ghost_process_cpu_system_seconds_total{job=~\"$job\"}[1m]) * 100",
             "interval": "",
             "legendFormat": "System CPU - {{job}}",
             "refId": "B"
           },
           {
-            "expr": "irate(ghost_process_cpu_seconds_total{job=~\"$job\"}[1m]) * 100",
+            "expr": "rate(ghost_process_cpu_seconds_total{job=~\"$job\"}[1m]) * 100",
             "interval": "",
             "legendFormat": "Total CPU - {{job}}",
             "refId": "C"