diff --git a/chart/environment-values/values.openwifi-qa.single-external-db.yaml b/chart/environment-values/values.openwifi-qa.single-external-db.yaml
index ee46384..4529eaf 100644
--- a/chart/environment-values/values.openwifi-qa.single-external-db.yaml
+++ b/chart/environment-values/values.openwifi-qa.single-external-db.yaml
@@ -71,8 +71,9 @@ postgresql-ha:
     repmgrPassword: repmgr
     maxConnections: 475
     sharedBuffers: 128MB
-#    extendedConf:
-#      - sharedBuffers: 128MB
+    env:
+      - name: POSTGRESQL_EXTRA_FLAGS
+        value: "-c shared_buffers=128MB"
     resources:
       requests:
         cpu: 250m