1.2.3.1 Exadata Smart Flash Cache

Exadata Smart Flash Cache stores frequently accessed data in high-performance flash storage.

Exadata Smart Flash Cache automatically works in conjunction with Oracle Database to intelligently optimize cache efficiency by favoring frequently accessed and high-value data. Each database I/O contains a tag that indicates the likelihood of repeated data access. This information is combined with internal statistics and other measures, such as the object size and access frequency, to determine whether to cache the data.

Just as importantly, Exadata Smart Flash Cache avoids caching data that will never be reused or will not fit into the cache. For example, a backup operation does not read data repeatedly, so backup-related I/O is not cached.

By default, caching occurs automatically and requires no user or administrator effort.