diff --git a/clusters/brusnika-stage/infrastructure/patches/prometheus-stack.yaml b/clusters/brusnika-stage/infrastructure/patches/prometheus-stack.yaml
index 01fa772..2cf61bf 100644
--- a/clusters/brusnika-stage/infrastructure/patches/prometheus-stack.yaml
+++ b/clusters/brusnika-stage/infrastructure/patches/prometheus-stack.yaml
@@ -51,6 +51,14 @@ spec:
               - op: replace
                 path: /spec/groups/0/rules/4/labels/cluster
                 value: brusnika-stage
+              - op: replace
+                path: /spec/groups/0/rules/4/expr
+                value: >-
+                  (
+                    sum(rate(container_cpu_cfs_throttled_periods_total{container!="",namespace!="kube-system"}[15m])) by (container, pod, namespace, scope)
+                    /
+                    sum(rate(container_cpu_cfs_periods_total{container!="",namespace!="kube-system"}[15m])) by (container, pod, namespace, scope)
+                  ) > 0.80
               - op: replace
                 path: /spec/groups/0/rules/5/labels/cluster
                 value: brusnika-stage