I just haven't worked on any messaging system that ever sent messages that large. Normally instead of putting data directly on a queue you put in a database an

I just haven't worked on any messaging system that ever sent messages that large. Normally instead of putting data directly on a queue you put in a database and then send some kind of reference over the queue. That's mostly to avoid data races but as a side effect it makes it hard to get large messages like 1MB.