diff --git a/platform/monitoring/kube-prometheus-stack.yaml b/platform/monitoring/kube-prometheus-stack.yaml
index 199dfc2..b42063f 100644
--- a/platform/monitoring/kube-prometheus-stack.yaml
+++ b/platform/monitoring/kube-prometheus-stack.yaml
@@ -56,9 +56,10 @@ spec:
         resources:
           requests:
             cpu: 100m
-            memory: 384Mi
+            memory: 512Mi
           limits:
-            memory: 1Gi
+            memory: 2Gi                        # 1Gi OOMKilled (exit 137) during TSDB compaction/checkpoint
+                                               # spikes; 2Gi holds. Nodes have headroom (~2Gi free each).
         storageSpec:
           volumeClaimTemplate:
             spec: