The Oracle Database Appliance, introduced in 2011, is an Oracle Engineered System that is simple, optimized, and affordable. Through four generations of the Oracle Database Appliance, it has been enormously popular for customers deploying Oracle Database Enterprise Edition in a variety of production scenarios, especially where high availability using Oracle Real Application Clusters was required.

In June of 2016, Oracle announced an expansion of the Oracle Database Appliance family to include several new models, the Oracle Database Appliance X6-2S and the Oracle Database Appliance X6-2M. With an entry list price starting at a fourth of the cost of the prior generation Oracle Database Appliance hardware and flexible Oracle Database software licensing, these new models bring Oracle Engineered Systems to within reach of every organization.