Review the following considerations before planning the PostgreSQL installation:
You can install the version of PostgreSQL bundled with Identity Manger in an environment that runs an older version of the database program. To ensure that the new installation does not overwrite the previous version, specify a different directory for the files.
The identity applications apply some prerequisites to the database they use, such as PostgreSQL. For more information, see Section 28.3.5, Prerequisites for Installing the Database for the Identity Applications.
(Conditional) On Windows, you cannot install more than one version of PostgreSQL because the service account for Postgres does not handle both instances. Uninstall the old version before installing this version of Postgres.