When to use second level cache in hibernate

debugcn Published at Dev

Sawyer

I know how first and second level cache work in hibernate.

But I would like to know

1.when will be the first cache used and when will be the second

how are the objects stored in the first and second. Do the second level maintains a copy same as first

Augusto

The 1st level cache is maintained by the Session or EntityManager, and it's only used during the life of that object. That ensures that if you get/find/retrieve a specific entity more than once during the lifetime of a Session, you'll get the same instance back (or at least a proxy to the same instance).

The 2nd level cache is maintained outside the Session/EntityManager and usually there's a copy of the object, but that is not directly linked (as with objects in the Session).

A word of caution. If you use hibernate in an application that has several instances, the 2nd level cache is not shared amongst instances. For that you need to use a distributed cache (such as terracotta)... if you want consistency amongst the instances of the app. This is not a problem if you are caching static data.

Collected from the Internet

Please contact [email protected] to delete if infringement.

edited at2021-07-20

Comments

0 comments

From Dev

Related Related

Article

When to use second level cache in hibernate

When to use second level cache in hibernate

Will HQL query use Hibernate second-level cache

Will HQL query use Hibernate second-level cache

Hibernate second level cache example

Hibernate : Invalidating Second Level cache

infinispan as second level cache hibernate

When hibernate performs sync between second level cache and DB with various Cache modes?

Error when attempting to enable second level Hibernate cache in Spring-Hibernate

Hazelcast Hibernate second-level cache configuration

How to enable second level cache in Hibernate

Ehcache second level cache not working with JPA and Hibernate?

dirty reads of associations in hibernate second level cache

How hibernate second level cache works internally?

Entity update using hibernate second level cache

Configuring Infinispan as remote second level cache for Hibernate

hibernate second level cache with Redis -will it improve performance?

How hibernate second level cache works internally?

Is second level cache is Session specific in Hibernate

How to enable second level cache in Hibernate 5.2.2?

Hibernate 4 second level cache hibernate is not working with association (EhCache)

How hibernate ensures second level cache is updated with latest data in database

Spring Boot + JPA2 + Hibernate - enable second level cache

Collections not read from hibernate/ehcache second-level-cache

Hibernate: Is it possible to save a transient field in second level cache?

Mapping two CacheConcurrencyStrategy for the same Hibernate second-level cache region

Hibernate: Is it possible to save a transient field in second level cache?

Hibernate Second-Level Cache, Shared between different JVM

Hibernate + ehcache second level cache miss in simple example

Cannot find class [org.hibernate.cache.EhCacheProvider] using Second-level cache of Hibernate

Centralised Second Level Cache