For users, performance is the most visible aspect of any IT solution. Developers must make sure that the applications they build provide users with the functionality they need. Unfortunately, if those applications can't achieve adequate performance, the developers' efforts aren't judged as successful. Consequently, the search for ways to improve performance never ends.
Oracle Application Server includes three different types of caches that play a role in improving the overall performance of the product:
OracleAS Web Cache
An in-memory cache for web content of all kinds, including static pages, dynamic pages, and pages assembled from both static and dynamic content.
Java Object Cache
A cache for frequently used or expensive-to-create objects used by a particular Java application.
Web Object Cache
A Java Object Cache implementation used for HTTP-centric Java objects.
All three caches improve performance in the same wayby making commonly used data available more rapidly. This chapter describes the architecture and use of each cache.