I'm trying to understand how the max-size-bytes correlates to the actual size of the messages I have loaded on the queue. For example, I have about 8mb of messages that I load onto the queue with my max-size-bytes set to 209715200. Seems like it should be large enough but it isn't. I had to set max-size-bytes to 4097155200.  Can there really be this much overhead on each message? Why?