diff --git a/quickstart/README.md b/quickstart/README.md
index 74f1d207c4db..688a26330e67 100644
--- a/quickstart/README.md
+++ b/quickstart/README.md
@@ -71,3 +71,9 @@ You can feed trace data to Pinpoint using the TestApp UI, and check them using P
 **Web UI** - Run `quickstart/bin/stop-web.sh`
 
 **TestApp** - Run `quickstart/bin/stop-testapp.sh`
+
+## Extra
+
+Pinpoint Web uses Mysql to persist users, user groups, and alarm configurations.<br/>
+However Quickstart uses MockDAO to reduce memory usage.<br/>
+Therefore if you want to use Mysql for Quickstart, please refer to Pinpoint Web's [applicationContext-datasource.xml](../web/src/main/resources/applicationContext-datasource.xml), [jdbc.properties](../web/src/main/resources/jdbc.properties).