diff --git a/redhat/ocp4/4.15/2024.08.rhdh.book.md b/redhat/ocp4/4.15/2024.08.rhdh.book.md
index ebaa5881..74f14063 100644
--- a/redhat/ocp4/4.15/2024.08.rhdh.book.md
+++ b/redhat/ocp4/4.15/2024.08.rhdh.book.md
@@ -505,9 +505,30 @@ We will use keycloak to manage the user, and use it as the oauth2 provider for t
 oc new-project demo-keycloak
 
 
+
+oc delete -f ${BASE_DIR}/data/install/keycloak-db-pvc.yaml -n demo-keycloak
+
+cat << EOF > ${BASE_DIR}/data/install/keycloak-db-pvc.yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgresql-db-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+EOF
+
+oc create -f ${BASE_DIR}/data/install/keycloak-db-pvc.yaml -n demo-keycloak
+
+
+
 oc delete -f ${BASE_DIR}/data/install/keycloak-db.yaml -n demo-keycloak
 
 cat << EOF > ${BASE_DIR}/data/install/keycloak-db.yaml
+---
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
@@ -526,6 +547,7 @@ spec:
       containers:
         - name: postgresql-db
           image: postgres:15
+          args: ["-c", "max_connections=1000"]
           volumeMounts:
             - mountPath: /data
               name: cache-volume
@@ -540,18 +562,8 @@ spec:
               value: keycloak
       volumes:
         - name: cache-volume
-          ephemeral:
-            volumeClaimTemplate:
-              metadata:
-                labels:
-                  app: postgresql-db
-              spec:
-                accessModes: [ "ReadWriteOnce" ]
-                resources:
-                  requests:
-                    # storage size does not matter for hostpath, becuase it will use all of the disk free space.
-                    # but it must be set to actual required size for other storage class
-                    storage: 1Gi
+          persistentVolumeClaim:
+            claimName: postgresql-db-pvc
 ---
 apiVersion: v1
 kind: Service
@@ -624,8 +636,18 @@ oc get secret example-kc-initial-admin -n demo-keycloak -o jsonpath='{.data.user
 # admin
 
 oc get secret example-kc-initial-admin -n demo-keycloak -o jsonpath='{.data.password}' | base64 --decode && echo
-# b60d1b2c0cdc4b10a3e7b46f234286e8
+# 51a3bf077ab5465e84c51729c6a29f27
+
+
+# in postgresql pod terminal
+psql -U testuser -d keycloak
+# Type "help" for help.
 
+# keycloak=# SHOW max_connections;
+#  max_connections 
+# -----------------
+#  1000
+# (1 row)
 ```
 
 Base on the demo requirement, we need to create a realm named `RHDH`, which will be used for rhdh later.
diff --git a/redhat/ocp4/4.15/2024.10.keycloak.performance.md b/redhat/ocp4/4.15/2024.10.keycloak.performance.md
index 7291b62d..54a9717c 100644
--- a/redhat/ocp4/4.15/2024.10.keycloak.performance.md
+++ b/redhat/ocp4/4.15/2024.10.keycloak.performance.md
@@ -257,6 +257,8 @@ export PATH=/opt/keycloak/bin:$PATH
 
 ```yaml
 spec:
+  http:
+    httpEnabled: true
   cache:
     configMapFile:
       key: keycloak.cache-ispn.xml
@@ -517,7 +519,7 @@ oc apply -f ${BASE_DIR}/data/install/keycloak-script-create-users.yaml -n demo-k
 ```bash
 
 TOTAL_USERS=50000
-NUM_JOBS=5
+NUM_JOBS=10
 USERS_PER_JOB=$((TOTAL_USERS / NUM_JOBS))
 
 for job_id in $(seq 1 $NUM_JOBS); do
@@ -567,7 +569,7 @@ spec:
           name: keycloak-script-config-${job_id}
   backoffLimit: 4
 EOF
-
+  oc delete -n demo-keycloak -f ${BASE_DIR}/data/install/keycloak-script-create-users-${job_id}.yaml
   oc apply -f ${BASE_DIR}/data/install/keycloak-script-create-users-${job_id}.yaml -n demo-keycloak
 done