Contrast this to Microsoft SQL Server:

  $ systemctl status mssql-server
  ● mssql-server.service - Microsoft SQL Server Database Engine
     Loaded: loaded (/usr/lib/systemd/system/mssql-server.service; disabled; vendor preset: disabled)
     Active: active (running) since Mon 2023-06-19 15:48:05 CDT; 1min 18s ago
       Docs: https://docs.microsoft.com/en-us/sql/linux
   Main PID: 2125 (sqlservr)
      Tasks: 123
     CGroup: /system.slice/mssql-server.service
             ├─2125 /opt/mssql/bin/sqlservr
             └─2156 /opt/mssql/bin/sqlservr

Yeah multiprocess isn't Microsoft's style given how expensive creating processes is on Windows.

Oracle - never had a scalability issue on very big Linux, Solaris and HPUX systems though - they do it well in my experience.

I'm not sure what I wonder on more - seeing its not enabled on boot or seeing mssql under systemd