Exadata RDMA Memory (XRMEM) in the Exadata Storage Servers is leveraged as a shared read accelerator. The XRMEM Data Accelerator is a memory cache tier in front of Flash Cache, enabling orders of magnitude lower latency accessing remotely stored data. By utilizing RDMA to access memory remotely, XRMEM Data Accelerator bypasses the network and I/O stack, eliminating expensive CPU interrupts and context switches, and reducing latency by more than 17x, from 250 microseconds to as low as 14 microseconds. Smart Exadata System Software also ensures data is mirrored across storage servers, which provides additional fault tolerance. Exadata’s unique end-to-end integration between Oracle Database and Exadata Storage Servers automatically caches the hottest data blocks efficiently between the buffer cache in database servers and XRMEM and Flash Cache in storage servers. XRMEM is a shared storage tier across all of the storage nodes, which means the aggregate performance of this cache can be dynamically used by any database instance on any database server. This is a significant advantage over general-purpose storage architectures, which preclude sharing storage resources across database instances.