7.1.1 Persistent Memory Data Accelerator

Oracle Exadata Storage Server can now use a Persistent Memory (PMEM) Cache in front of Flash Cache. Known as Persistent Memory Data Accelerator, the PMEM cache uses Intel Optane™ DC Persistent Memory Modules (DCPMM). The Database Server uses remote direct memory access (RDMA) to enable 10x faster access latency to remote persistent memory.

Since the persistent memory is used as a shared cache, caching capacity effectively increases by 10x compared to directly using the persistent memory modules as expensive storage. This arrangement makes it cost effective to apply the benefits of persistent memory to multi-terabyte databases.

See Persistent Memory and RDMA for details.

Minimum requirements:

• Oracle Exadata System Software release 19.3.0
• Oracle Database 19c
• Oracle Exadata Storage Server X8M-2