Oracle Exalytics is a pre-configured BI appliance that is optimized for Oracle's BI and EPM applications. It features an in-memory database called Times Ten for fast, sub-second analysis. Exalytics uses techniques like columnar compression and in-memory caching to achieve lightning fast performance. It is part of Oracle's "Exa" family of engineered systems that also includes Exadata for data warehousing and Exalogic for enterprise applications.