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If they are and if it hasn't reached the it will batch those two statements together using JDBC2 batch.

However, if your statements look like the example above, hibernate will see alternating insert statements and will flush an individual insert statement for each record processed. Just add the following two lines to your hibernate configuration.

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So 1 million new customers would equal a total of 2 million insert statements in this case. These two parameters tell Hibernate to sort the insert and update statements before trying to batch them up.

This example Spring Framework source code file (Hibernate is included in the Dev "Java Source Code Warehouse" project. * * @author Juergen Hoeller * @since 1.2 * @see #set Session Factory * @see Hibernate Callback * @see org.hibernate.

The problem is that even if you are flushing your first level cache, you may not be batching your SQL statements.

Hibernate flushes by default for the following reasons: The thing to note here is that until the session is flushed, every persistent object is placed into the first level cache (your JVM's memory).

Most people who use batch probably find out about it by trying to perform a large operation and finding out the hard way why batching is needed. Once this is resolved they assume that batching is working properly.

The intent of this project is to help you "Learn Java by Example" dataaccessexception, dataaccessexception, hibernatecallback, hibernatecallback, hibernateexception, hibernateexception, io, jdbc, list, lockmode, object, object, query, reflection, serializable, session, sql, string, util /* * Copyright 2002-2008 the original author or authors. Session * @see Local Session Factory Bean * @see Hibernate Transaction Manager * @see org.springframework.

* * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. Jta Transaction Manager * @see Open Session In View Filter * @see

* Else, the Iterator won't be able to read results from its Result Set anymore, * as the underlying Hibernate Session will already have been closed.

) * are supposed to be used within Spring-driven or JTA-driven transactions * (with Hibernate Transaction Manager, Jta Transaction Manager, or EJB CMT).

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