Because workloads with high Symmetrix cache read-hit rates are serviced at memory access speed, storing the data needed on EFDs may not result in a significant increase in performance.
因为具有高symmetrix缓存读中率的工作负载都是以内存访问速度实现的，所以在EFD中存储所需要的数据可能不会对性能有大的改进。
CICS TG on z/OS makes use of the EXCI to provide high speed cross memory access to CICS, a mechanism not available on other platforms as it is an MRO-based communications mechanism.
z/OS 上的 CICS TG 使用 EXCI 提供对 CICS 的高速交叉存储访问，这是其他平台无法提供的机制，因为它是基于 MRO 的通信机制。
By letting the main operating part of the database reside constantly in the main memory, and utilizing the quick access speed, the system performance is greatly enhanced.
它通过将数据库的“工作版本”常驻内存，利用内存快速的存取速度，使系统性能获得很大的改善。
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