Скачать или смотреть Hibernate Caching | Hibernate Tutorial in Hindi | #16

Hibernate caching improves the performance of the application by pooling the object in the cache. It is useful when we have to fetch the same data multiple times.
There are mainly two types of caching:
1). First Level Cache - Session object holds the first level cache data. It is enabled by default. The first level cache data will not be available to entire application. An application can use many session object.
2). Second Level Cache - SessionFactory object holds the second level cache data. It is useful if you have multiple session objects from a session factory.The data stored in the second level cache will be available to entire application. But we need to enable it explicitely.
Different vendors have provided the implementation of Second Level Cache these are -
i). EH (Easy Hibernate) Cache
ii). Swarm Cache
iii). OS Cache
iv). JBoss Cache
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Each implementation provides different cache usage functionality. There are four ways to use second level cache.

a). read-only: caching will work for read only operation.
b). nonstrict-read-write: caching will work for read and write but one at a time.
c). read-write: caching will work for read and write, can be used simultaneously.
d). transactional: caching will work for transaction.
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