Getting started with In-Memory Databases in ASE 15.5: Technical Whitepaper
Sybase Adaptive Server Enterprise (ASE) version 15.5 provides In-Memory Database (IMDB) capabilities designed to deliver low response times and high throughput to mission-critical systems. ASE 15.5 provides new in-memory database (IMDB) capabilities that offer customers additional options to achieve better performing applications. These performance improvements are realized by optionally relaxing the 'Atomic' and 'Durable' properties of ACID transaction behavior. By relaxing these aspects, ASE 15.5 can avoid disk I/O altogether, as well as optimize the maintenance of the transaction log; thereby delivering improved performance.