RabbitMQ on single machine

[vincent_treton]

It is advisable to install RabbitMQ on the same server as Magento CE ?

Or is there additional benefits other than CPU/memory availability of having it on another server?

The sole purpose of it is to replace cronjobs for some specific tasks, so I believe as long as Mysql and RabbitMQ have different CPU thread and there is enough memory available then it should be ok. 

[milindsingh]

It is not advised to run on the same server as scaling it becomes an issue. If the your corn jobs are exhausting all memory than It might be a wrong corn implementation.
I would suggest breaking long tasks into smaller tasks (chunks) and using a queue to process them.

There is a guide by Nexess which will help you for configurations: https://www.nexcess.net/white-paper/magento-2-optimized-ebook/

Thanks