PostgreSQL (often simply referred as Postgres) is an open-source object relational database. VMware introduced VMware vFabric Postgres back in 2011: vPostgres is based on and fully compatible with the open-source PostgreSQL software and all the tools related. This product comes in a virtual appliance form factor or as a simple Linux RPM to install, and leverages several optimizations related to virtualization:
Elastic Database Memory,
Specific Tuning (with higher default values), ...