Installer will allow you to create only one cluster by default. If you want more than one server instance, then the best option would be to manually execute the initdb and start the services
Bug reference: 17286 Logged by: Marrow Yung Email address: marrow.yung@gmail.com PostgreSQL version: 11.14 Operating system: windows server Description:
when install open source edition of PostgreSQL 11.14 on top of a Window server 2012 R2 box which ALREADY has a earlier version of PostgreSQL installed with collation other than default one, the installation of PostgreSQL 11.14 or other version ALSO will collation other than the default one, the installer will fail and no PostgreSQL windows service will be installed.
the second PostgreSQL installation only works if it use default collation . I want more than one PostgreSQL instance on the SAME windows server box to use other collation , e.g. traditional chinese (Hong Kong)