[rabbitmq-discuss] Consumer Callback
matthias at rabbitmq.com
Tue Aug 16 20:48:59 BST 2011
On 16/08/11 19:41, fangbot wrote:
> With 50,000 messages per batch and 100 bytes per message, I am seeing a
> throughput of about 6.3k messages/second, both with and without persistence.
> I expected to see a much lower throughput when messages are sent with
> MessageProperties.minimal_persistent, since they must each be written to the
> database. However, it appears that this is not the case. When do persistent
> messages get written to the database?
You are consuming in auto-ack mode. That means the queue can generally
send messages to a consumer as soon as it receives them *and the
promptly forget about them*. So as long as the consumers can keep up
your messages never make it anywhere near the disk.
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