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Hibernate

Specification Of second Level Cache
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Hibernate Specification says that cache provider must defined block in memory for storing object. I these storing block objects are stored in it. Each block must have name and must have some additional properties.Second level cache is divided into two parts

  1. Object cache
  2. Query Cache

Object Cache:-In object ache ,object along with there relation are stored in Simplified Form.

Query Cache:-In query cache, Queries are stored along with the ID of fetched object.

For the implementation of query cache two reasons are created in memory

  1. In first reason query along with the value of parameter to stored as key and id of returned object are stored as value.
  2. In second region time stamp of query execution is stored. The Purpose of this region is to identified whether result of query is valid or not.
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