It's a postgres install with a proprietary extension. Management burden is about as low as it gets for a small app -- make sure its got HD space for storage and

It's a postgres install with a proprietary extension. Management burden is about as low as it gets for a small app -- make sure its got HD space for storage and logs, lock it down sensibly, set up a cron job to export daily backup dumps to S3, and you're good. I one-man-armied software dev for a $20m/yr company doing exactly this a little while back and postgres caused problems pretty much never.