我尝试配置@Vlad Mihalcea博客中提到的JDBC批量大小 https://vladmihalcea.com/how-to-customize-the-jdbc-batch-size-for-each-persistence-context-with-hibernate/
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
entityManager.unwrap(Session.class).setJdbcBatchSize(5);
for(int i = 0;i<10;i++){
Charge c = new Charge();
c.setAccountNumber("acct"+i);
entityManager.persist(c);
}
entityManager.getTransaction().commit();
<bean id="entityManagerFactoryDefault"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="charg" />
<property name="persistenceUnitName" value="MaterializedView" />
<property name="persistenceXmlLocation" value="classpath*:META-INF/jpa-persistence.xml" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="generateDdl" value="false" />
<property name="showSql" value="true"/>
<property name="database">
<util:constant static-field="org.springframework.orm.jpa.vendor.Database.ORACLE" />
</property>
</bean>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.default_batch_fetch_size">500</prop>
<prop key="hibernate.jdbc.fetch_size">10</prop>
<prop key="hibernate.jdbc.batch_versioned_data">true</prop>
<prop key="hibernate.order_updates">true</prop>
<prop key="hibernate.order_inserts">true</prop>
<prop key="hibernate.jdbc.batch_size">30</prop>
<prop key="hibernate.id.new_generator_mappings">false</prop>
</props>
</property>
</bean>
但是它会触发10个插入查询。
我得到了这个问题 Hibernate:从dual中选择charge.nextval Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?) Hibernate:插入CHARGE(ACCOUNTNUMBER CHARGE_ID)值(?,?)
我使用hibernate 5.2.10.Final版本和序列作为策略。 如果我的代码中有错误,有人可以纠正我吗
答案 0 :(得分:2)
Hibernate日志记录机制可能会误导你。
使用datasource-proxy查看批处理是否有效。查看this article for more details。