Max length How many (ready) messages a queue can contain before it starts dropping them. Dropping strategy decided by overflow arg. | Max length bytes The max length of a queue in bytes. | Message TTL How long a message published to a queue can live before it is discarded (milliseconds). | Overflow behaviour This determines what happens to messages when the maximum length of a queue is reached. Valid value are: drop-head (default) or reject-publish. | Auto expire How long a queue can be unused for before it is automatically deleted (milliseconds). | Dead letter exchange Optional name of an exchange to which messages will be republished if they are rejected or expire. | Dead letter routing key Optional replacement routing key to use when a message is dead-lettered. If not set, the message's original routing key will be used. | Federation upstream Chooses a specific upstream set to use for federation. Incompatible with federation-upstream-set. | Federation upstream set Chooses the name of a set of upstreams to use with federation, or "all" to use all upstreams. Incompatible with federation-upstream. | Delivery limit The number of times a message can be redelivered before dropped or dead-lettered | Max age Stream queue segments will be deleted when all messages in the segmented is older than this. Valid units are Y(ear), M(onth), D(ays), h(ours), m(inutes), s(seconds). Segments are only deleted when new messages are published to the stream queue.