diff --git a/historyserver/config/historyserver-azureblob.yaml b/historyserver/config/historyserver-azureblob.yaml
index 2c1a72d4771..8b33160269e 100644
--- a/historyserver/config/historyserver-azureblob.yaml
+++ b/historyserver/config/historyserver-azureblob.yaml
@@ -46,6 +46,13 @@ spec:
         - --ray-root-dir=log
         ports:
         - containerPort: 8080
+        # Cache is soft-bounded at 8 GiB; 12 GiB leaves decode headroom.
+        # The 2 GiB request keeps examples schedulable; size production requests to residency.
+        args:
+        - --session-cache-max-bytes=8589934592
         resources:
-          limits:
+          requests:
             cpu: "500m"
+            memory: "2Gi"
+          limits:
+            memory: "12Gi"
diff --git a/historyserver/config/historyserver-gcs.yaml b/historyserver/config/historyserver-gcs.yaml
index a678356a2aa..8bb4a7dea64 100644
--- a/historyserver/config/historyserver-gcs.yaml
+++ b/historyserver/config/historyserver-gcs.yaml
@@ -44,6 +44,13 @@ spec:
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 8080
+        # Cache is soft-bounded at 8 GiB; 12 GiB leaves decode headroom.
+        # The 2 GiB request keeps examples schedulable; size production requests to residency.
+        args:
+        - --session-cache-max-bytes=8589934592
         resources:
-          limits:
+          requests:
             cpu: "500m"
+            memory: "2Gi"
+          limits:
+            memory: "12Gi"
diff --git a/historyserver/config/historyserver.yaml b/historyserver/config/historyserver.yaml
index 09366353bff..0928bc53b9a 100644
--- a/historyserver/config/historyserver.yaml
+++ b/historyserver/config/historyserver.yaml
@@ -65,6 +65,13 @@ spec:
         # - --use-auth-token-mode=true
         ports:
         - containerPort: 8080
+        # Cache is soft-bounded at 8 GiB; 12 GiB leaves decode headroom.
+        # The 2 GiB request keeps examples schedulable; size production requests to residency.
+        args:
+        - --session-cache-max-bytes=8589934592
         resources:
-          limits:
+          requests:
             cpu: "500m"
+            memory: "2Gi"
+          limits:
+            memory: "12Gi"
diff --git a/historyserver/pkg/eventserver/eventserver.go b/historyserver/pkg/eventserver/eventserver.go
index 1b1f81ddfa6..920bc25d385 100644
--- a/historyserver/pkg/eventserver/eventserver.go
+++ b/historyserver/pkg/eventserver/eventserver.go
@@ -133,7 +133,7 @@ func (h *EventHandler) storeEvent(clusterSessionKey string, eventMap map[string]
 	}
 	eventType := types.EventType(eventTypeStr)
 
-	logrus.Infof("current eventType: %v", eventType)
+	logrus.Debugf("current eventType: %v", eventType)
 	switch eventType {
 	case types.TASK_DEFINITION_EVENT:
 		return h.handleTaskDefinitionEvent(eventMap, clusterSessionKey, false)