[CentOS-devel] RabbitMQ eats 1.6GB ram on CentOS Stream 9

Thu Aug 11 14:59:20 UTC 2022
Alfredo Moralejo Alonso <amoralej at redhat.com>

Adding Petr who is the main maintainer for Rabitmq in messaging SIG.

Alfredo

On Thu, Aug 11, 2022 at 4:56 PM Marcin Juszkiewicz <
marcin.juszkiewicz at linaro.org> wrote:

> As part of OpenStack deployments we deploy RabbitMQ. During current
> cycle I looked at moving from CentOS Stream 8 to 9.
>
> And RabbitMQ is a problem.
>
> When I boot CentOS Stream 9 system and then use just built 'rabbitmq'
> container memory use of "/usr/lib64/erlang/erts-12.3.2.2/bin/beam.smp"
> process goes up to 1.6GB ram:
>
> (rabbitmq)[root at kolla-cs9 /]# rabbitmq-diagnostics memory_breakdown
> Reporting memory breakdown on node rabbit at kolla-cs9...
> other_system: 1.6233 gb (68.59%)
> allocated_unused: 0.5164 gb (21.82%)
> binary: 0.1551 gb (6.55%)
> code: 0.0356 gb (1.51%)
> other_proc: 0.0184 gb (0.78%)
> connection_other: 0.0037 gb (0.16%)
> other_ets: 0.0036 gb (0.15%)
> queue_procs: 0.0021 gb (0.09%)
> plugins: 0.0021 gb (0.09%)
> connection_readers: 0.0021 gb (0.09%)
> atom: 0.0014 gb (0.06%)
> mgmt_db: 0.001 gb (0.04%)
> metrics: 8.0e-4 gb (0.03%)
> connection_writers: 4.0e-4 gb (0.02%)
> connection_channels: 4.0e-4 gb (0.02%)
> mnesia: 3.0e-4 gb (0.01%)
> msg_index: 0.0 gb (0.0%)
> quorum_ets: 0.0 gb (0.0%)
> stream_queue_procs: 0.0 gb (0.0%)
> stream_queue_replica_reader_procs: 0.0 gb (0.0%)
> queue_slave_procs: 0.0 gb (0.0%)
> quorum_queue_procs: 0.0 gb (0.0%)
> stream_queue_coordinator_procs: 0.0 gb (0.0%)
> reserved_unallocated: 0.0 gb (0.0%)
>
> If I boot the same container on Debian host then same process uses 0.2GB
> ram:
>
> (rabbitmq)[root at debian /]# rabbitmq-diagnostics memory_breakdown
> Reporting memory breakdown on node rabbit at debian...
> binary: 0.2787 gb (70.2%)
> code: 0.0355 gb (8.93%)
> other_system: 0.0255 gb (6.44%)
> other_proc: 0.0209 gb (5.26%)
> connection_other: 0.0108 gb (2.72%)
> mgmt_db: 0.0073 gb (1.84%)
> plugins: 0.0048 gb (1.2%)
> other_ets: 0.0037 gb (0.93%)
> connection_readers: 0.003 gb (0.75%)
> queue_procs: 0.0028 gb (0.7%)
> atom: 0.0015 gb (0.37%)
> metrics: 0.0011 gb (0.28%)
> connection_channels: 8.0e-4 gb (0.21%)
> mnesia: 4.0e-4 gb (0.1%)
> connection_writers: 2.0e-4 gb (0.05%)
> msg_index: 0.0 gb (0.01%)
> quorum_ets: 0.0 gb (0.01%)
> stream_queue_procs: 0.0 gb (0.0%)
> stream_queue_replica_reader_procs: 0.0 gb (0.0%)
> queue_slave_procs: 0.0 gb (0.0%)
> quorum_queue_procs: 0.0 gb (0.0%)
> stream_queue_coordinator_procs: 0.0 gb (0.0%)
> allocated_unused: 0.0 gb (0.0%)
> reserved_unallocated: 0.0 gb (0.0%)
>
>
> So I started checking. Maybe it is a problem of Erlang/RabbitMQ packages
> provided by RabbitMQ team?
>
> Booted CS9 system and deployed OpenStack using Debian based containers.
> Again 1.6GB memory use.
>
> So let build CS9 based containers using Erlang/RabbitMQ from CentOS
> Stream 9 "messaging/rabbitmq-38" repository. Again 1.6GB memory use.
>
> I am wondering what is a reason?
>
> And what is proper solution?
>
>
> For now I only know not-acceptable solution: deploy OpenStack using
> Debian or Ubuntu and forget about CentOS Stream 9 and rest of RHEL 9
> family.
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>
>
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