如何驗證hibernate.jdbc.batch_size是否正常工作？

Question

在我的休眠屬性中，我有<prop key =“ hibernate.jdbc.batch_size”> 30 </ prop>

在我的代碼中，我做了類似的事情

final StatelessSession sSession = sessionFactory.openStatelessSession();
try {
    sSession.connection().setAutoCommit(false);
} catch (final SQLException se) {
    // log a message
}
final Transaction tx = sSession.beginTransaction();
try{
    for ( some loop ) {
        Customer customer = new Customer(.....);
        sSession.insert(customer);
        /* Do we need to flush a stateless session? It doesn't have methods for it
        if ( i % 30 == 0 ) { //30, same as the JDBC batch size
            //flush a batch of inserts and release memory:
            sSession.flush();
            sSession.clear();
        }
        */
    } 
    //sSession.flush();// Do we need to flush a stateless session? It doesn't have methods for it
    //sSession.clear();
} finally{
    tx.commit();
    sSession.close();
}

我的Pojo具有以下內容

@Id
//@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "ID", nullable = false, unique = true)
private Long id;

但是，當我更改批次大小時，它似乎並沒有影響整體運行時間。 我如何驗證它確實在工作？

謝謝！

Answer 1

注釋掉session.flush(); 看看20次循環插入后是否插入了任何東西

更新：更新后的問題

評論//@GeneratedValue(strategy = GenerationType.AUTO)應該退回到默認值，即AFAIK身份

嘗試使用

@TableGenerator(name="TABLE_GEN", table="SEQUENCE_TABLE", pkColumnName="SEQ_NAME", valueColumnName="SEQ_COUNT", pkColumnValue="EMP_SEQ")
@GeneratedValue(strategy=GenerationType.TABLE, generator="TABLE_GEN")

Answer 2

您可以設置hibernate.generate_statistics = true並查找JDBC批處理上的統計信息。