[rabbitmq-discuss] RabbitMQ memory management

Fri Sep 12 22:22:46 BST 2008

Ben Hood wrote:

> No, you've understood it correctly. If you send enough non-persistent
> messages, eventually the queues will fill up, the broker will crash
> and you will lose all of the messages that you sent to that node. ATM
I assume this condition can't happen by design if messages are published with immediate 
flag set to true, right?

<field name = "immediate" type = "bit">
     request immediate delivery
     <doc>
       This flag tells the server how to react if the message cannot be
       routed to a queue consumer immediately.  If this flag is set, the
       server will return an undeliverable message with a Return method.
       If this flag is zero, the server will queue the message, but with
       no guarantee that it will ever be consumed.
     </doc>
     <doc name = "rule" test = "amq_basic_16">
       The server SHOULD implement the immediate flag.
     </doc>
   </field>

Does it mean a message is returned if it can't be immediately routed to a queue or a 
message is returned if it can't be immediately routed to a consumer?

- Dmitriy