Fix JVM stability for Java services under continuous sim load

kubernetes/base/configmaps/app-config.yaml

@@ -96,6 +96,7 @@ data:
   DB_SCHEMA: "transactions_service"
   SERVER_PORT: "8080"
   SPRING_PROFILES_ACTIVE: "docker"
+  ERROR_SPIKE_ENABLED: "false"
   MANAGEMENT_TRACING_ENABLED: "true"
   MANAGEMENT_ENDPOINT_HEALTH_PROBES_ENABLED: "true"
   MANAGEMENT_TRACING_SAMPLING_PROBABILITY: "1.0"

kubernetes/base/deployments/accounts-service-deployment.yaml

@@ -44,7 +44,7 @@ spec:
               name: banking-jwt-secret
               key: secret
         - name: JAVA_OPTS
-          value: "-Xms64m -Xmx128m -XX:MaxMetaspaceSize=128m -XX:ReservedCodeCacheSize=32m -XX:MaxDirectMemorySize=16m -XX:+UseSerialGC -XX:+UseStringDeduplication -XX:+UseContainerSupport -Djava.security.egd=file:/dev/./urandom -Dspring.main.lazy-initialization=true"
+          value: "-Xms128m -Xmx384m -XX:MaxMetaspaceSize=128m -XX:ReservedCodeCacheSize=32m -XX:MaxDirectMemorySize=16m -XX:+UseSerialGC -XX:+UseStringDeduplication -XX:+UseContainerSupport -Djava.security.egd=file:/dev/./urandom -Dspring.main.lazy-initialization=true"
         - name: AWS_S3_BUCKET
           value: "banking-app-statements"
         - name: AWS_REGION
@@ -60,11 +60,10 @@ spec:
             name: banking-accounts-config
         resources:
           requests:
-            memory: "256Mi"
+            memory: "384Mi"
             cpu: "50m"
           limits:
-            memory: "512Mi"
-            # Right-sized for live sim traffic; 150m throttled the JVM (see user-service).
+            memory: "1Gi"
             cpu: "1000m"
         startupProbe:
           tcpSocket:

kubernetes/base/deployments/transactions-service-deployment.yaml

@@ -44,18 +44,18 @@ spec:
               name: banking-jwt-secret
               key: secret
         - name: JAVA_OPTS
-          value: "-Xms64m -Xmx128m -XX:MaxMetaspaceSize=128m -XX:ReservedCodeCacheSize=32m -XX:MaxDirectMemorySize=16m -XX:+UseSerialGC -XX:+UseStringDeduplication -XX:+UseContainerSupport -Djava.security.egd=file:/dev/./urandom -Dspring.main.lazy-initialization=true"
+          value: "-Xms128m -Xmx384m -XX:MaxMetaspaceSize=128m -XX:ReservedCodeCacheSize=32m -XX:MaxDirectMemorySize=16m -XX:+UseSerialGC -XX:+UseStringDeduplication -XX:+UseContainerSupport -Djava.security.egd=file:/dev/./urandom -Dspring.main.lazy-initialization=true"
         envFrom:
         - configMapRef:
             name: app-config
         - configMapRef:
             name: banking-transactions-config
         resources:
           requests:
-            memory: "256Mi"
+            memory: "384Mi"
             cpu: "50m"
           limits:
-            memory: "512Mi"
+            memory: "1Gi"
             # Right-sized for live sim traffic; 150m throttled the JVM (see user-service).
             cpu: "1000m"
         startupProbe:

kubernetes/overlays/speedscale/kustomization.yaml

@@ -4,6 +4,7 @@ kind: Kustomization
 resources:
 - ../../base
 - ../../observability
+- speedscale-metrics-services.yaml
 
 patches:
 # Add Istio injection and Speedscale labels to the existing banking-app namespace

kubernetes/overlays/speedscale/speedscale-metrics-services.yaml

@@ -0,0 +1,34 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: speedscale-forwarder-metrics
+  namespace: speedscale
+  labels:
+    app.kubernetes.io/name: speedscale
+    app.kubernetes.io/component: forwarder-metrics
+spec:
+  selector:
+    app: speedscale-forwarder
+    controlplane.speedscale.com/component: forwarder
+  ports:
+    - port: 4145
+      targetPort: 4145
+      protocol: TCP
+      name: metrics
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: speedscale-nettap-metrics
+  namespace: speedscale
+  labels:
+    app.kubernetes.io/name: speedscale
+    app.kubernetes.io/component: nettap-metrics
+spec:
+  selector:
+    app: speedscale-nettap
+  ports:
+    - port: 4145
+      targetPort: 4145
+      protocol: TCP
+      name: metrics