The problem is that Postgres is a long lived server so the app can fire a commit to the DB and then exit. Here, the app needs to perform the sync, so you can't

The problem is that Postgres is a long lived server so the app can fire a commit to the DB and then exit. Here, the app needs to perform the sync, so you can't exit. I didn't see a way to confirm the sync was complete either, so when can you safely exit?