It seems that the queue schema handles the byteDepth parameter only as uint32 (eventually count32 in management-schema.xml). Given the possibilities for queue sizes, the uint32 seems to be insufficient. I already run into situations, when the uint32 is not enough:
It makes the byteDepth value unreliable and thus useless. Of course, the actual depth can be always calculated from the byteTotalEnqueues and byteTotalDequeues values, but it would be probably easier if already the byteDepth value would be uint64.
Thanks & Regards