The document discusses various topics related to Hibernate caching including: 1) It describes different cache levels - transaction, application, and cluster level caches. 2) It lists some common cache providers supported by Hibernate like EHCache, OScache, Swarmcache, and JBosscache. 3) It explains different cache strategies like read-only, nonstrict-read-write, and read-write. 4) It provides guidance on optimizing Hibernate queries and relationships to improve performance. 5) It covers concepts like the first and second level caches, query caching, and use of sessions and transactions.

1. Hibernate cache 2007/03/16

4. cache level (2/2) cluster transaction application transaction application transaction transaction

5. Hibernate cache transaction application cluster concept session session factory third party hibernate

6. Cache providers Cache Cluster Safe Query Cache Hashtable yes EHcache yes OScache yes Swarmcache yes JBosscache yes yes

8. cache concurrency strategy support cache read-only nonstrict-read-write read-write transactional hashtable yes yes yes EHCache yes yes yes OSCache yes yes yes SwarmCache yes yes JBoss yes yes

10. session.get step in session? DataBase No session.get Yes session

11. session.load step in session? session.get Yes session No in session factory? DataBase No session factory Yes

12. collection cache setting <hibernate mapping> <class name=“User”> ……… . <set name=“addresses” table=“t_addresses” …… > <cache usage=“read-only”> User.hbm.xml

15. set ehcache.xml <defaultCache maxElementsInMemory=&quot;10000&quot; eternal=&quot;false&quot; timeToIdleSeconds=&quot;120&quot; timeToLiveSeconds=&quot;120&quot; overflowToDisk=&quot;false&quot; />