Auto Expire How long a queue can be unused for before it is automatically deleted (milliseconds). | Max Length How many (ready) messages a queue can contain before it starts to drop them from its head. | Message TTL How long a message published to a queue can live before it is discarded (milliseconds). | Delivery limit The number of times a message can be redelivered before dropped or dead-lettered | Overflow behaviour Determines what happens to messages when the maximum length of a queue is reached. Valid value are drop-head (default) and reject-publish. | 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. | Max Priority Make the queue a priority queue, with a fixed level of different priorities (max 255) | Stream Queue Make the queue a stream queue. It has to be durable and can't be auto-delete | 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. | Message deduplication Enable deduplication for this exchange | Deduplication cache size Deduplication cache size, in number of entries | Deduplication cache ttl How long an entry lives in the deduplication cache, in milliseconds | Deduplication header Which header to check for deduplication, defaults to x-deduplication-header