[rabbitmq-discuss] rabbitmq memory usage

[Matthias Radestock]

On 25/02/14 18:41, thexray at gmail.com wrote:
> So the publishing rate drops to zero, because Erlang RAM usage goes over
> the limit of vm_memory_high_watermark (in my case, 3GB).

Correct.

> Then my question is: is it normal that 100 million persisted messages
> use 3 GB of memory?

Did you see my answer here: 
http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/2014-February/034109.html 
?

> Shouldn't broker page them to disk and free memory?

It does, but some index information is always kept in memory, so there 
is a fixed per-message memory cost.

Matthias.