From 4b0e16806f33b802ca932a50ddd327f293d289a8 Mon Sep 17 00:00:00 2001
From: Florian Sesser <florian@private.storage>
Date: Wed, 17 Aug 2022 14:22:54 +0000
Subject: [PATCH] Workaround: Consider ZoL ARC "free" memory too
One query for hosts with ZFS and one for those without.
---
.../resources-overview.json | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
index 6eeeb226..130639b1 100644
--- a/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
+++ b/nixos/modules/monitoring/server/grafana-dashboards/resources-overview.json
@@ -375,11 +375,26 @@
"uid": "000000001"
},
"exemplar": true,
- "expr": "1 - (node_memory_MemAvailable_bytes + node_zfs_arc_size) / node_memory_MemTotal_bytes",
+ "expr": "1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes unless node_zfs_arc_size",
+ "hide": false,
+ "instant": false,
"interval": "",
"intervalFactor": 4,
"legendFormat": "{{instance}}",
- "refId": "A"
+ "refId": "Hosts without ZFS"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "000000001"
+ },
+ "exemplar": true,
+ "expr": "1 - (node_memory_MemAvailable_bytes + node_zfs_arc_size) / node_memory_MemTotal_bytes",
+ "hide": false,
+ "instant": false,
+ "interval": "",
+ "legendFormat": "{{instance}}",
+ "refId": "Hosts with ZFS"
}
],
"title": "RAM used %",
--
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