PostgreSQL database requirements for ArcGIS 10.4.x
Visit Esri Support for general support information on Esri's Supported Environment Policy, as well as information on earlier versions.
Minimum supported database versions
PostgreSQL 9.4.5 (64 bit)
PostGIS 2.1
PostgreSQL 9.3.10 (64 bit)
PostGIS 2.1
PostgreSQL 9.2.14 (64 bit)
PostGIS 2.0
Supported operating systems
The operating system of the server your database management system is installed on must meet the ArcGIS for Server operating system requirements.
Software required to connect to a DBMS
Most ArcGIS applications that can connect to a PostgreSQL database include the required PostgreSQL client libraries. These applications include: ArcGIS for Server, ArcGIS for Desktop, ArcGIS Pro, and ArcReader.
Esri tests and certifies specific major and minor releases of PostgreSQL installations that are available from PostgreSQL.org. For each PostgreSQL release Esri supports, available PostGIS modules are also tested and certified. No other modules extending PostgreSQL functionality are included in Esri certification.