Hi All,


I am new to Hibernate. I am going through Batch processing concepts while reading about this. At the link given below
http://www.hibernate.org/hib_docs/v3/re ... batch.html
There is something specified at article 13.1 batch inserts like
session.flush();
session.clear();
My Ques is..... why are we using both at a time. can we not go for session.clear() only. As per me both are used to clear the session. I want to know that what benefit we are having when using both at same time.

Thanks,
Gopal

Hi,
>>> As per me both are used to clear the session.
Incorrect.

Flushing is the process of synchronizing the underlying persistent store with persistable state held in memory.
Clear results in evicting all persistent objects in the session thus making that memory available for garbage collection.

In the above case, flush forces the session to issue insert queries while clear frees the in-memory imprint.

Benefits:
i) Less Memory.
ii) Scalable. ( no more OutOfMemory Errors )

This has been discussed many times in this forum.
You can have a look at them

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