title: RabbitMQ's beam.smp eats too much of CPU
body: <p>Running the RabbitMQ server on VM and I see that sometimes it starts to consume too much of the CPU.</p>
  <p><code>top</code> command shows:</p>
  <blockquote>
  <p>535 rabbitmq  20   0 1844684 139084  67656 S 16.5  0.8 547:30.28
  beam.smp</p>
  </blockquote>
  <p>It doesn't a permanent situation, but it returns once in 1-3 hours, at the time when it isn't used by consumers (no messages were sent)</p>
  <p>My question is - that it is and if it can be configured to prevent such situation?</p>
  <pre><code>rabbitmqctl version
  3.9.6
  </code></pre>