The Oracle instance is a workspace on the Oracle database server where Oracle keeps a single database. You need to create a new instance in Oracle if you have an existing Oracle database server whose parameters do not comply with the parameters required to use SmartPlant Engineering Manager on Oracle. This way you can append the SmartPlant Engineering Manager database to existing Oracle databases on your Oracle database server without losing your existing Oracle database information.
You can create as many instances as required and, in this way, append as many databases
as you need on a single database server. However, note that appending instances on your Oracle database server can slow down
your work in the SmartPlant Engineering Manager database located on that server.
For additional information about limitations on creation of instances, see your Oracle User Guide.