Update rules.yml

_data/rules.yml

@@ -273,6 +273,8 @@ groups:
                 description: OOM kill detected
                 query: "(increase(node_vmstat_oom_kill[30m]) > 0)"
                 severity: warning
+                comments: |
+                  When a machine runs out of memory, the node exporter can become unresponsive for several minutes. Even if the system takes 15–20 minutes to recover, the alert should still trigger.
               - name: Host EDAC Correctable Errors detected
                 description: 'Host {{ $labels.instance }} has had {{ printf "%.0f" $value }} correctable memory errors reported by EDAC in the last 5 minutes.'
                 query: "(increase(node_edac_correctable_errors_total[1m]) > 0)"