If we evaluate previous practices, the system deployment is divided into several servers: for the system itself, for the DBMS, the server for reports and licences, and, if necessary, the test environment. The requirements for the servers are different, for example, the recommended characteristics for the DBMS server are as follows
RAM: 32 GB
Number of cores: 12 or more
ROM: 100 GB (system)
ROM: 200 GB (for database, preferably SSD)
ROM: 100 GB (PAGE)
Requirements are conditional and depend on the specific project. In case of acute necessity and expediency it is possible to place the system on one server (not recommended for production environments).