如何使用Hibernate和Spring Boot启用批量插入

时间：2015-12-11 16:21:41

标签： java spring hibernate jpa spring-boot

我想在交叉表中插入大量实体。为此，我想启用hibernate的批量插入选项，这样每个插入一次不会添加1行，而是添加20行或50行。

我正在尝试重现hibernate's tutorial的结果。我已经创建了一个测试函数，它将尝试插入30个客户，就像示例中一样：

//Batch inserting test entities
//This code is inside transaction already, so I'm not creating a new one
entityManager.flush();
for (int i = 0; i < 30; ++i) {
    Customer customer = new Customer("Customer" + i, (i + 5) * 1000, "Position " + i);
    entityManager.persist(customer);
    if (i % 20 == 0) {
        entityManager.flush();
        entityManager.clear();
    }
}
entityManager.flush();
entityManager.clear();

Customer类没有生成ID。

@Entity
public class Customer {

    @Id
    private String id;
    @Column
    private String name;
    @Column
    private long salary;
    @Column
    private String position;

    public Customer() {

    }

    public Customer(String name, long salary, String position) {
        this.id = UUID.randomUUID().toString();
        this.name = name;
        this.salary = salary;
        this.position = position;
    }

}

我期待看到的是2个插入语句，一个用于20个记录，一个用于10个记录。但是，当我打开postgres日志时，我看到30个插入语句，每个语句只插入一行。我已经仔细检查了可以使用postgres插入多行。

我认为问题是由hibernate.jdbc.batch_size 20参数引起的，我应该将其传递给hibernate。但是，由于我使用的是spring boot，因此我唯一的配置文件是application.properties。所以我试着在那里插入它：

hibernate.jdbc.batch_size=20
hibernate.order_inserts=true
hibernate.order_updates=true
hibernate.jdbc.batch_versioned_data=true
spring.jpa.hibernate.jdbc.batch_size=20
spring.jpa.hibernate.order_inserts=true
spring.jpa.hibernate.order_updates=true
spring.jpa.hibernate.jdbc.batch_versioned_data=true
spring.jpa.properties.hibernate.jdbc.batch_size=20
spring.jpa.properties.hibernate.order_inserts=true
spring.jpa.properties.hibernate.order_updates=true
spring.jpa.properties.hibernate.jdbc.batch_versioned_data=true

根据这个answer，这应该足够了，但是 我还尝试将这些参数复制到jar中的hibernate.properties文件中，并通过命令行提供参数：-Dhibernate.jdbc.batch_size=20，如documentation中所述。

这些都没有帮助 我也找不到在我的代码中读取批量大小属性的方法。似乎hibernate文档中提到的大多数对象在spring引导应用程序中都不存在 如何在spring boot应用程序中启用hibernate的批量插入？

我创建了一个最小的工作示例来重现问题： https://github.com/Alexey-/spring-boot-batch

收到Vlad Mihalcea的回答后，我意识到是的，事实上批处理语句正在运行，至少在hibernate和jdbc级别上。

然而，postgres日志本身显示出非常有趣的行为：对于批量插入和普通插入的情况，它们几乎相同。

我最初期望看到的是，hibernate会使用这样的语句：

test=# INSERT INTO customer (name, position, salary, id) values ('CustomerX', 'PositionX', '1000', 'idX'), ('CUSTOMERY', 'POSITIONY', '1000', 'idY');

哪会产生与此类似的日志记录：

2015-12-15 11:43:33.238 MSK LOG:  statement: INSERT INTO customer (name, position, salary, id) values ('CustomerX', 'PositionX', '1000', 'idX'), ('CUSTOMERY', 'POSITIONY', '1000', 'idY');

然而，事实并非如此 当启用批量插入时（p6spy显示该语句实际上是批处理的），postgres将生成类似于此的日志：

2015-12-15 12:07:00.638 MSK LOG:  execute <unnamed>: BEGIN
2015-12-15 12:07:00.638 MSK LOG:  duration: 0.000 ms
2015-12-15 12:07:00.638 MSK LOG:  duration: 0.000 ms  parse <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.638 MSK LOG:  duration: 0.000 ms  bind <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.638 MSK DETAIL:  parameters: $1 = 'Customer0', $2 = 'Position 0', $3 = '0', $4 = '9c6a86fb-c991-4e98-aa65-fa736ef67dd7'
2015-12-15 12:07:00.638 MSK LOG:  execute <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.638 MSK DETAIL:  parameters: $1 = 'Customer0', $2 = 'Position 0', $3 = '0', $4 = '9c6a86fb-c991-4e98-aa65-fa736ef67dd7'
2015-12-15 12:07:00.639 MSK LOG:  duration: 1.000 ms
2015-12-15 12:07:00.648 MSK LOG:  duration: 0.000 ms  parse S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.648 MSK LOG:  duration: 0.000 ms  bind S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.648 MSK DETAIL:  parameters: $1 = 'Customer1', $2 = 'Position 1', $3 = '10', $4 = 'c8b2669c-044a-4a4d-acbd-31c3bcd9a783'
2015-12-15 12:07:00.648 MSK LOG:  execute S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.648 MSK DETAIL:  parameters: $1 = 'Customer1', $2 = 'Position 1', $3 = '10', $4 = 'c8b2669c-044a-4a4d-acbd-31c3bcd9a783'
2015-12-15 12:07:00.648 MSK LOG:  duration: 0.000 ms
2015-12-15 12:07:00.648 MSK LOG:  duration: 0.000 ms  bind S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.648 MSK DETAIL:  parameters: $1 = 'Customer2', $2 = 'Position 2', $3 = '20', $4 = '1c694f41-2ce7-4ee2-a0c0-f359690506f0'
2015-12-15 12:07:00.649 MSK LOG:  execute S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.649 MSK DETAIL:  parameters: $1 = 'Customer2', $2 = 'Position 2', $3 = '20', $4 = '1c694f41-2ce7-4ee2-a0c0-f359690506f0'
2015-12-15 12:07:00.649 MSK LOG:  duration: 0.000 ms
2015-12-15 12:07:00.649 MSK LOG:  duration: 0.000 ms  bind S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.649 MSK DETAIL:  parameters: $1 = 'Customer3', $2 = 'Position 3', $3 = '30', $4 = '1815947d-2604-48d4-a6be-43f6905130cf'
2015-12-15 12:07:00.649 MSK LOG:  execute S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.649 MSK DETAIL:  parameters: $1 = 'Customer3', $2 = 'Position 3', $3 = '30', $4 = '1815947d-2604-48d4-a6be-43f6905130cf'
2015-12-15 12:07:00.649 MSK LOG:  duration: 0.000 ms
2015-12-15 12:07:00.649 MSK LOG:  duration: 0.000 ms  bind S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.649 MSK DETAIL:  parameters: $1 = 'Customer4', $2 = 'Position 4', $3 = '40', $4 = 'cc521007-820f-4d58-8e1a-16a166aa91cf'
2015-12-15 12:07:00.649 MSK LOG:  execute S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:07:00.649 MSK DETAIL:  parameters: $1 = 'Customer4', $2 = 'Position 4', $3 = '40', $4 = 'cc521007-820f-4d58-8e1a-16a166aa91cf'
2015-12-15 12:07:00.649 MSK LOG:  duration: 0.000 ms
... the rest of the logs is identical and do not provide any valuable information...

当批处理语句被禁用时（p6spy显示没有执行批处理），日志将如下所示：

2015-12-15 12:09:00.246 MSK LOG:  execute <unnamed>: BEGIN
2015-12-15 12:09:00.246 MSK LOG:  duration: 0.000 ms
2015-12-15 12:09:00.246 MSK LOG:  duration: 0.000 ms  parse <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.246 MSK LOG:  duration: 0.000 ms  bind <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.246 MSK DETAIL:  parameters: $1 = 'Customer0', $2 = 'Position 0', $3 = '0', $4 = '9e085ad0-437f-4d7d-afaa-e342e031cbee'
2015-12-15 12:09:00.246 MSK LOG:  execute <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.246 MSK DETAIL:  parameters: $1 = 'Customer0', $2 = 'Position 0', $3 = '0', $4 = '9e085ad0-437f-4d7d-afaa-e342e031cbee'
2015-12-15 12:09:00.246 MSK LOG:  duration: 0.000 ms
2015-12-15 12:09:00.248 MSK LOG:  duration: 0.000 ms  parse <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.248 MSK LOG:  duration: 0.000 ms  bind <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.248 MSK DETAIL:  parameters: $1 = 'Customer1', $2 = 'Position 1', $3 = '10', $4 = 'f29cfa40-7d24-49a6-ae5d-2a2021932d80'
2015-12-15 12:09:00.248 MSK LOG:  execute <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.248 MSK DETAIL:  parameters: $1 = 'Customer1', $2 = 'Position 1', $3 = '10', $4 = 'f29cfa40-7d24-49a6-ae5d-2a2021932d80'
2015-12-15 12:09:00.249 MSK LOG:  duration: 1.000 ms
2015-12-15 12:09:00.250 MSK LOG:  duration: 0.000 ms  parse <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.250 MSK LOG:  duration: 0.000 ms  bind <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.250 MSK DETAIL:  parameters: $1 = 'Customer2', $2 = 'Position 2', $3 = '20', $4 = '067dd6d4-5060-467f-b533-75994ecbaedc'
2015-12-15 12:09:00.250 MSK LOG:  execute <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.250 MSK DETAIL:  parameters: $1 = 'Customer2', $2 = 'Position 2', $3 = '20', $4 = '067dd6d4-5060-467f-b533-75994ecbaedc'
2015-12-15 12:09:00.250 MSK LOG:  duration: 0.000 ms
2015-12-15 12:09:00.250 MSK LOG:  duration: 0.000 ms  parse <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.250 MSK LOG:  duration: 0.000 ms  bind <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.251 MSK DETAIL:  parameters: $1 = 'Customer3', $2 = 'Position 3', $3 = '30', $4 = '7df32327-f2f5-4011-848d-55aafb3f09fa'
2015-12-15 12:09:00.251 MSK LOG:  execute <unnamed>: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.251 MSK DETAIL:  parameters: $1 = 'Customer3', $2 = 'Position 3', $3 = '30', $4 = '7df32327-f2f5-4011-848d-55aafb3f09fa'
2015-12-15 12:09:00.251 MSK LOG:  duration: 0.000 ms
2015-12-15 12:09:00.251 MSK LOG:  duration: 0.000 ms  parse S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.251 MSK LOG:  duration: 0.000 ms  bind S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.251 MSK DETAIL:  parameters: $1 = 'Customer4', $2 = 'Position 4', $3 = '40', $4 = '1e55ab6a-8780-4c8f-8af2-2886d954f819'
2015-12-15 12:09:00.251 MSK LOG:  execute S_1: insert into customer (name, position, salary, id) values ($1, $2, $3, $4)
2015-12-15 12:09:00.251 MSK DETAIL:  parameters: $1 = 'Customer4', $2 = 'Position 4', $3 = '40', $4 = '1e55ab6a-8780-4c8f-8af2-2886d954f819'
2015-12-15 12:09:00.251 MSK LOG:  duration: 0.000 ms
... the rest of the logs is identical and do not provide any valuable information...

因此，两者之间的唯一区别是当批处理被禁用时，postgres将花费更多的时间来意识到它应该重用已准备好的语句。

所以我决定进行性能测试来证实这一点 我尝试将30.000条记录插入空数据库 禁用批处理，需要334毫秒 启用批处理后，耗时4650毫秒！

然后我删除了对entityManager.flush的所有调用（只留下了entityManager.clear），时间减少到了320ms。我不知道为什么hibernate的教程建议使用flush。我猜这只是一个错误。

所以我想底线是这样的：批处理工作，但它没有提供任何真正的好处（至少对于postgres）。此外，不正确地使用它（如在教程中）可能会导致可怕的，可怕的结果。使用风险自负，并始终衡量实际性能提升。

1 个答案:

答案 0 :(得分：14)

您的代码没有任何问题，而且它正常运行。

我调试了它然后我安装了p6spy并且它正在工作。你也可以这样做：

  1. 在build.gradle中添加此依赖项：

    compile 'p6spy:p6spy:2.1.4'

  2. 修改连接属性，如下所示：

    database.driver=com.p6spy.engine.spy.P6SpyDriver
database.url=jdbc:p6spy:postgresql://localhost:5432/

  3. 在spy.properties中添加resources。您可以下载from here。

    4. 然后你会看到批量陈述：

    2015-12-14 19:38:03.655  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114683655|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer0', 'Position 0', 5000, '9f92ac01-8156-41f1-9bdb-36ff622a99cc')
2015-12-14 19:38:03.658  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114683658|2|statement|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer0', 'Position 0', 5000, '9f92ac01-8156-41f1-9bdb-36ff622a99cc')
2015-12-14 19:38:04.212  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684212|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer1', 'Position 1', 6000, 'e3a1dc5a-2183-4fb0-aa9a-4fb8cace23a3')
2015-12-14 19:38:04.213  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684213|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer2', 'Position 2', 7000, '8824f5be-afe5-4a6a-ab8a-8f266db5973f')
2015-12-14 19:38:04.213  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684213|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer3', 'Position 3', 8000, '249304b3-19c5-4376-b5dc-2da685c1db64')
2015-12-14 19:38:04.213  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684213|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer4', 'Position 4', 9000, '2bf15945-94c3-45f8-b0d1-e2fedbdcbaca')
2015-12-14 19:38:04.214  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684214|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer5', 'Position 5', 10000, '85b2b999-5d84-4181-9c71-1a83b4d20b86')
2015-12-14 19:38:04.214  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684214|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer6', 'Position 6', 11000, '8ed6289e-3d04-4ba5-9285-9bce202c8dae')
2015-12-14 19:38:04.215  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684215|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer7', 'Position 7', 12000, '2fc489a8-c6c4-4984-808d-2da9a2e8ad4a')
2015-12-14 19:38:04.215  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684215|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer8', 'Position 8', 13000, '897cd341-b65b-4521-87e6-f4fb78b09bfd')
2015-12-14 19:38:04.215  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684215|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer9', 'Position 9', 14000, 'fa59d5a7-2570-43f9-ba46-595b8fcefa35')
2015-12-14 19:38:04.216  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684216|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer10', 'Position 10', 15000, '0b5b38d1-d644-4ea0-a3f0-9aa025463b8a')
2015-12-14 19:38:04.216  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684216|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer11', 'Position 11', 16000, 'afbb349f-cf28-4cfb-b5b8-73b4df6fa4b1')
2015-12-14 19:38:04.216  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684216|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer12', 'Position 12', 17000, 'd6719dc4-1dfd-433f-a8ae-4c931f461e78')
2015-12-14 19:38:04.216  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684216|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer13', 'Position 13', 18000, 'ca277f3c-d51e-493d-a4f7-a945879bd7d0')
2015-12-14 19:38:04.217  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684217|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer14', 'Position 14', 19000, '07014145-332b-4b4c-b320-9412443c45b6')
2015-12-14 19:38:04.217  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684217|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer15', 'Position 15', 20000, '8ffde083-420f-418d-b624-b059b9e28f3b')
2015-12-14 19:38:04.217  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684217|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer16', 'Position 16', 21000, '6ac39900-69db-408a-bda1-4d2706da49ba')
2015-12-14 19:38:04.217  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684217|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer17', 'Position 17', 22000, '45f6db1b-18cd-4986-8f46-ce8f02d9588d')
2015-12-14 19:38:04.217  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684217|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer18', 'Position 18', 23000, 'b4312298-a818-4b7a-9cff-7923328de4dc')
2015-12-14 19:38:04.218  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684218|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer19', 'Position 19', 24000, 'efe7e3d2-da11-40ce-9fee-6f77726499db')
2015-12-14 19:38:04.218  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684218|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer20', 'Position 20', 25000, 'd51484c3-36e2-4737-b5c9-135709ad1d30')
2015-12-14 19:38:04.808  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684808|2|statement|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer20', 'Position 20', 25000, 'd51484c3-36e2-4737-b5c9-135709ad1d30')
2015-12-14 19:38:04.811  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684811|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer21', 'Position 21', 26000, '8c7e0e43-f89f-4000-8367-3406974102f4')
2015-12-14 19:38:04.811  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684811|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer22', 'Position 22', 27000, 'ab757793-1c45-4861-aff8-aa5cea3c8bd5')
2015-12-14 19:38:04.812  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684812|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer23', 'Position 23', 28000, 'edf18735-cc27-437b-9a28-156f57b51343')
2015-12-14 19:38:04.812  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684812|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer24', 'Position 24', 29000, 'c882f053-2e9a-405f-bb94-3ba83303aefe')
2015-12-14 19:38:04.812  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684812|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer25', 'Position 25', 30000, 'd6af1feb-5842-4b40-816d-8e2aaa2ce9b3')
2015-12-14 19:38:04.812  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684812|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer26', 'Position 26', 31000, '48f6a4cb-5671-4b73-bb51-3e37964fa136')
2015-12-14 19:38:04.813  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684812|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer27', 'Position 27', 32000, '6ac59ed6-2a0f-4dbb-a6d7-7231a9c9d2cc')
2015-12-14 19:38:04.813  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684813|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer28', 'Position 28', 33000, '57565a6a-4e44-4fe0-86bd-837a9687487d')
2015-12-14 19:38:04.813  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684813|0|batch|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer29', 'Position 29', 34000, 'f3c2dbdd-5d54-4bf3-86d2-327c60ee5cc0')
2015-12-14 19:38:04.814  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684814|1|statement|connection 7|insert into customer (name, position, salary, id) values (?, ?, ?, ?)|insert into customer (name, position, salary, id) values ('Customer29', 'Position 29', 34000, 'f3c2dbdd-5d54-4bf3-86d2-327c60ee5cc0')
2015-12-14 19:38:04.817  INFO 14116 --- [io-18080-exec-3] p6spy  : 1450114684817|2|commit|connection 7||

    第三列是batch，表示该语句是在JDBC批处理中执行的。

    提及batch之前的列表示执行语句所花费的毫秒数。具有0的那些用于将语句添加到批处理中。

    第3列中包含statement的那些（因此在第2列中具有1或2）适用于批处理执行时，对应于第20列和第30次迭代。

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