Java SpringDataJPA：非常慢的插入和选择查询

我有一个非常简单的SpringDataJPA+Hibernate应用程序，它将客户数据存储在MySql数据库中（完整的源代码已经发布）

问题在于，与mysql CLI相比，它运行insert和select查询的速度非常慢

• 插入一行需要3600毫秒
• 全选（仅2行）耗时~1700ms
• 这两个查询都采用mysql CLI，大约0.12s

这里讨论了一个类似的问题，但是在我的例子中，测量结果要糟糕得多（即使我没有插入批处理，它只是DB中的一个简单行）。在SpringJPA/Hibernate中有没有提高性能的方法

另一个问题是，有没有办法减少spring数据jpa和hibernate entitymanager的大小？我能够排除byte-buddy和jandex依赖项，而不会对程序造成损害，但这仅仅是几MB（着色jar大小从19.6Mb降至16.6Mb）

更新 根据要求，以下是代码（所有来源为）：

这是Spring应用程序，也是保存（插入）客户：

public class Application {
  private static ApplicationContext applicationContext;

  static CustomerRepository customerRepository;

  public static void main(String[] args) throws InterruptedException {

    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(MySQLAutoconfiguration.class);

    customerRepository = ctx.getBean(CustomerRepository.class);
    runTest();
  }

private static void runTest () throws {
...
//insert
  Customer customerJohn = customerRepository.save(new Customer("John"));
//select
  Customer foundEntity = customerRepository.findOne(customerJohn.getId());
...
}

和配置：

@Configuration
@ComponentScan
@EnableJpaRepositories (basePackages = "com.vk.dal.repository")
@PropertySource("classpath:mysql.properties")
public class MySQLAutoconfiguration {

  @Autowired
  private Environment env;

  @Bean
  public DataSource dataSource() {
    final DriverManagerDataSource dataSource = new DriverManagerDataSource();

    dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
    dataSource.setUrl(env.getProperty("spring.datasource.url"));
    dataSource.setUsername(env.getProperty("spring.datasource.username") != null ? env.getProperty("spring.datasource.username") : "");
    dataSource.setPassword(env.getProperty("spring.datasource.password") != null ? env.getProperty("spring.datasource.password") : "");

    return dataSource;
  }

  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
    final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setDataSource(dataSource);
    em.setPackagesToScan("com.vk.dal.domain");
    em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
    Properties properties = additionalProperties();
    if (properties != null) {
      em.setJpaProperties(properties);
    }
    return em;
  }

  @Bean
  JpaTransactionManager transactionManager(final EntityManagerFactory entityManagerFactory) {
    final JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(entityManagerFactory);
    return transactionManager;
  }


  final Properties additionalProperties() {
    final Properties hibernateProperties = new Properties();

    hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("mysql-hibernate.hbm2ddl.auto"));
    hibernateProperties.setProperty("hibernate.dialect", env.getProperty("mysql-hibernate.dialect"));
    hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("mysql-hibernate.show_sql") != null ? env.getProperty("mysql-hibernate.show_sql") : "false");

    return hibernateProperties;
  }

}

---

非常感谢您的帮助。

您能添加一些您正在使用的类似代码的实体，以及您如何持久化和获取数据……在如此大的框架上的第一个操作需要大量的类加载、预热等。可能save（）隐藏了这个问题，而时间是不正确的？@Ashish451added@JacekCz，我想我在加载Spring后运行save（）。不管怎么说，Spring\Hibernate确实非常繁重，但降级的程度太糟糕了：每插入一条记录超过3秒，每选择一条记录几乎2秒——这太多了。没有一部作品能忍受这种情况。我也有类似的事情发生在我身上。你能找到解决办法吗？

@Configuration
@ComponentScan
@EnableJpaRepositories (basePackages = "com.vk.dal.repository")
@PropertySource("classpath:mysql.properties")
public class MySQLAutoconfiguration {

  @Autowired
  private Environment env;

  @Bean
  public DataSource dataSource() {
    final DriverManagerDataSource dataSource = new DriverManagerDataSource();

    dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
    dataSource.setUrl(env.getProperty("spring.datasource.url"));
    dataSource.setUsername(env.getProperty("spring.datasource.username") != null ? env.getProperty("spring.datasource.username") : "");
    dataSource.setPassword(env.getProperty("spring.datasource.password") != null ? env.getProperty("spring.datasource.password") : "");

    return dataSource;
  }

  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
    final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setDataSource(dataSource);
    em.setPackagesToScan("com.vk.dal.domain");
    em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
    Properties properties = additionalProperties();
    if (properties != null) {
      em.setJpaProperties(properties);
    }
    return em;
  }

  @Bean
  JpaTransactionManager transactionManager(final EntityManagerFactory entityManagerFactory) {
    final JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(entityManagerFactory);
    return transactionManager;
  }


  final Properties additionalProperties() {
    final Properties hibernateProperties = new Properties();

    hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("mysql-hibernate.hbm2ddl.auto"));
    hibernateProperties.setProperty("hibernate.dialect", env.getProperty("mysql-hibernate.dialect"));
    hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("mysql-hibernate.show_sql") != null ? env.getProperty("mysql-hibernate.show_sql") : "false");

    return hibernateProperties;
  }

}