diff --git a/helm/files/conf/node-4.0.conf b/helm/files/conf/node-4.0.conf
index e9ba906..cbce72f 100644
--- a/helm/files/conf/node-4.0.conf
+++ b/helm/files/conf/node-4.0.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"
diff --git a/helm/files/conf/node-4.1.conf b/helm/files/conf/node-4.1.conf
index e9ba906..cbce72f 100644
--- a/helm/files/conf/node-4.1.conf
+++ b/helm/files/conf/node-4.1.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"
diff --git a/helm/files/conf/node-4.2.conf b/helm/files/conf/node-4.2.conf
index bc854c3..f2733ff 100644
--- a/helm/files/conf/node-4.2.conf
+++ b/helm/files/conf/node-4.2.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"
diff --git a/helm/files/conf/node-4.3.conf b/helm/files/conf/node-4.3.conf
index e9ba906..cbce72f 100644
--- a/helm/files/conf/node-4.3.conf
+++ b/helm/files/conf/node-4.3.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"
diff --git a/helm/files/conf/node-4.4.conf b/helm/files/conf/node-4.4.conf
index e9ba906..cbce72f 100644
--- a/helm/files/conf/node-4.4.conf
+++ b/helm/files/conf/node-4.4.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"
diff --git a/helm/files/conf/node-4.5.conf b/helm/files/conf/node-4.5.conf
index e9ba906..cbce72f 100644
--- a/helm/files/conf/node-4.5.conf
+++ b/helm/files/conf/node-4.5.conf
@@ -48,7 +48,13 @@ dataSourceProperties: {
   dataSource.password: "{{ .Values.corda.node.conf.dataSource.password }}"
 }
 {{- if ne .Values.corda.node.conf.dataSource.className "" }}
-database.runMigration=true
+database = {
+{{- if eq .Values.corda.node.conf.dataSource.className "oracle.jdbc.pool.OracleDataSource" }}
+    transactionIsolationLevel = READ_COMMITTED
+    schema = xe
+{{- end}}
+    runMigration = true
+}
 {{- end}}
 
 trustStorePassword: "{{ .Values.corda.node.conf.truststorePassword }}"