Performance test Postgres app

To provision and benchmark an IMAP server backed by PostgreSQL, please have a look at following steps:

1. Build and extract the Postgres app docker image.

   • mvn clean install -DskipTests -Dmaven.skip.doc=true
   • docker load -i ./target/jib-image.tar

2. Run the Postgres app: docker compose up

3. Retrieve the generated WebAdmin password from the James startup logs, then provision users and IMAP mailboxes + messages: WEBADMIN_PASSWORD="replace-with-generated-webadmin-password" ./provision.sh

4. Performance test IMAP server using james-gatling

   Sample IMAP simulation: gatling:testOnly org.apache.james.gatling.simulation.imap.PlatformValidationSimulation.