[rabbitmq-discuss] Flow Control is to rigorous

Tue Apr 30 13:43:32 BST 2013

On 26/04/13 17:41, rabbit15 wrote:
> Hi, can you tell mi if value vm watermark can be set more than 1.0 ? I want
> to set it to value 2.0. Is that danger value for the system ?

The high watermark can be set to a high value like 100 if you want, but
the broker will be more likely to run out of memory. The section on
configuring the memory threshold has more information:

http://www.rabbitmq.com/memory.html

On 26/04/13 10:36, rabbit15 wrote:
> I know that there is mechanism that I can check how much data is on the
> queue (f.e. declare passive queue), but I don't know when flow control would
> be started. I don't want to flow control will block sending messages.

If you set the disk free limit to zero and the vm_memory_high_watermark
to a very high multiplier then flow control will not block messages, but
the broker is likely to crash due to running out of resources.

-Emile