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Fix NodeMemoryHighUtilization

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Take buffer cache into account when calculating the alert.
That memory is avaiable to applications when needed.

Fixes: https://github.com/prometheus-community/helm-charts/issues/4567
Signed-off-by: Reinhard Tartler <siretart@gmail.com>
This commit is contained in:
Reinhard Tartler 2025-06-23 22:32:36 +00:00
parent 2179f0a34d
commit b7f9148d0d
1 changed files with 1 additions and 1 deletions
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2
docs/node-mixin/alerts/alerts.libsonnet
View file

@ -363,7 +363,7 @@
{ {
alert: 'NodeMemoryHighUtilization', alert: 'NodeMemoryHighUtilization',
expr: ||| expr: |||
100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > %(memoryHighUtilizationThreshold)d 100 - ((node_memory_Cached_bytes{%(nodeExporterSelector)s} + node_memory_MemAvailable_bytes{%(nodeExporterSelector)s}) / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > %(memoryHighUtilizationThreshold)d
||| % $._config, ||| % $._config,
'for': '15m', 'for': '15m',
labels: { labels: {