8 Cache

A cache is a repository that stores recently used objects for an application. Holding objects in the cache helps you minimize database access, and improves application performance.

Oracle Application Server TopLink uses two object caches: The session cache maintains objects retrieved from and written to the database; the Unit of Work cache holds objects while they participate in transactions. These caches maintain objects based on class and primary key values.

This chapter explores cache use, and discusses the following topics:

• Introduction to Cache Concepts

• Cache Locking and Isolation

• Distributed Cache Synchronization

• Remote Command Manager