[rabbitmq-discuss] Number of connections and memory usage

Fri Sep 30 01:29:13 BST 2011

Thank you Matthias. We deployed that config to production but haven't seen
any real change... How can we tell if RabbitMQ is indeed using these
settings?

Thanks!

--
Raphael.

On Fri, Sep 23, 2011 at 12:18 PM, Matthias Radestock
<matthias at rabbitmq.com>wrote:

> Raphael,
>
>
> On 23/09/11 19:11, Raphael Simon wrote:
>
>> We are using RabbitMQ 2.4 in our production environment and are running
>> into issues with memory usage. We are seeing a direct relation between
>> the number of connections and the memory usage (the graphs are
>> identical). The ratio is 200 KB / connection which seems hefty
>> especially with about 50,000 connections open on each broker this ends
>> up consuming all the ram.
>> [...]
>>
>> I'm wondering if there is a setting somewhere that can be tweaked
>>
>
> Reduce the socket send and receive buffer sizes by sticking the following
> in your rabbitmq.config:
>
> [{rabbit, [{tcp_listen_options, [binary,
>                                 {packet,        raw},
>                                 {reuseaddr,     true},
>                                 {backlog,       128},
>                                 {nodelay,       true},
>                                 {sndbuf,        1024},
>                                 {recbuf,        1024},
>                                 {exit_on_close, false}]}]}].
>
> (All but the sndbuf and recbuf settings are identical to the defaults)
>
>
> Regards,
>
> Matthias.
>
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