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Fix cache hit rate on APM and Fly.io dashboards #177

Merged
eblume merged 1 commit from fix/cache-hit-rate-dashboards into main 2026-02-12 18:40:48 -08:00
Conversation 0 Commits 1 Files changed 5 +7 -4
5 changed files with 7 additions and 4 deletions
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3
argocd/manifests/grafana-config/dashboards/configmap-cv-apm.yaml
View file

@ -90,6 +90,7 @@ data:
"fieldConfig": {
"defaults": {
"color": { "mode": "thresholds" },
"mappings": [{ "type": "special", "options": { "match": "null+nan", "result": { "text": "No traffic", "color": "text" } } }],
"thresholds": { "mode": "absolute", "steps": [{ "color": "red", "value": null }, { "color": "yellow", "value": 0.5 }, { "color": "green", "value": 0.8 }] },
"unit": "percentunit"
},
@ -106,7 +107,7 @@ data:
"textMode": "auto"
},
"targets": [
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(rate(flyio_nginx_cache_requests_total{host=\"cv.eblu.me\",cache_status=\"HIT\"}[5m])) / sum(rate(flyio_nginx_cache_requests_total{host=\"cv.eblu.me\"}[5m]))", "refId": "A" }
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(increase(flyio_nginx_cache_requests_total{host=\"cv.eblu.me\",cache_status=\"HIT\"}[$__range])) / sum(increase(flyio_nginx_cache_requests_total{host=\"cv.eblu.me\"}[$__range]))", "refId": "A" }
],
"title": "Cache Hit Ratio",
"type": "stat"

3
argocd/manifests/grafana-config/dashboards/configmap-docs-apm.yaml
View file

@ -90,6 +90,7 @@ data:
"fieldConfig": {
"defaults": {
"color": { "mode": "thresholds" },
"mappings": [{ "type": "special", "options": { "match": "null+nan", "result": { "text": "No traffic", "color": "text" } } }],
"thresholds": { "mode": "absolute", "steps": [{ "color": "red", "value": null }, { "color": "yellow", "value": 0.5 }, { "color": "green", "value": 0.8 }] },
"unit": "percentunit"
},
@ -106,7 +107,7 @@ data:
"textMode": "auto"
},
"targets": [
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(rate(flyio_nginx_cache_requests_total{host=\"docs.eblu.me\",cache_status=\"HIT\"}[5m])) / sum(rate(flyio_nginx_cache_requests_total{host=\"docs.eblu.me\"}[5m]))", "refId": "A" }
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(increase(flyio_nginx_cache_requests_total{host=\"docs.eblu.me\",cache_status=\"HIT\"}[$__range])) / sum(increase(flyio_nginx_cache_requests_total{host=\"docs.eblu.me\"}[$__range]))", "refId": "A" }
],
"title": "Cache Hit Ratio",
"type": "stat"

3
argocd/manifests/grafana-config/dashboards/configmap-flyio.yaml
View file

@ -101,6 +101,7 @@ data:
"fieldConfig": {
"defaults": {
"color": { "mode": "thresholds" },
"mappings": [{ "type": "special", "options": { "match": "null+nan", "result": { "text": "No traffic", "color": "text" } } }],
"thresholds": { "mode": "absolute", "steps": [{ "color": "red", "value": null }, { "color": "yellow", "value": 0.5 }, { "color": "green", "value": 0.8 }] },
"unit": "percentunit"
},
@ -117,7 +118,7 @@ data:
"textMode": "auto"
},
"targets": [
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(rate(flyio_nginx_cache_requests_total{instance=\"flyio-proxy\",cache_status=\"HIT\"}[5m])) / sum(rate(flyio_nginx_cache_requests_total{instance=\"flyio-proxy\"}[5m]))", "refId": "A" }
{ "datasource": { "type": "prometheus", "uid": "prometheus" }, "expr": "sum(increase(flyio_nginx_cache_requests_total{instance=\"flyio-proxy\",cache_status=\"HIT\"}[$__range])) / sum(increase(flyio_nginx_cache_requests_total{instance=\"flyio-proxy\"}[$__range]))", "refId": "A" }
],
"title": "Cache Hit Ratio",
"type": "stat"

1
docs/changelog.d/fix-cache-hit-rate-dashboards.bugfix.md Normal file
View file

@ -0,0 +1 @@
Fix cache hit rate panels on APM and Fly.io dashboards showing blank/red or misleading 100% for low-traffic static sites.

1
fly/alloy.river
View file

@ -79,7 +79,6 @@ loki.process "nginx" {
name = "flyio_nginx_cache_requests_total"
description = "Total cache lookups by cache status."
source = "cache_status"
match_all = true
action = "inc"
}
}