> You want to use an external blob-store, by default it uses its own postgres to store them. However, it also doesn't do any garbage collection

The lack of garbage collection by default will be fixed in next week's stable release, we're really sorry that it caused you pain!

> The default limits on memory is 1gb, and for our app, when it runs out, it just crashes. Leaving no obvious error messages to be found.

Indeed, we're working on documenting this and exposing out-of-memory events in the app logs so that this is obvious.