java - 如何使用 Hibernate 和 Spring Boot 启用批量插入

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，以便每次插入不会一次添加 1 行，而是 20 或 50 行。

我正在尝试重现 hibernate's tutorial 的结果.我创建了一个测试函数，它将尝试插入 30 个客户，就像在示例中一样:

//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 类没有生成的 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;
    }

}

我期望看到的是 2 个插入语句，一个用于 20 条记录，一个用于 10 条记录。但是，当我打开 postgres 日志时，我看到 30 个插入语句，每个只插入 1 行。我仔细检查了是否可以使用 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，所以我拥有的唯一配置文件是 application.properties。所以我尝试将它插入那里:

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

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

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 boot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？

我创建了一个重现问题的最小工作示例: https://github.com/Alexey-/spring-boot-batch

在收到 Vlad Mihalcea 的回答后，我意识到是的，实际上批处理语句正在工作，至少在 hibernate 和 jdbc 级别上是这样。

然而，postgres 日志本身表现出非常有趣的行为:它们在批量插入和普通插入的情况下几乎相同。

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');

这会产生类似这样的日志记录:

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 显示语句实际上是批处理的)，postgres 将产生类似这样的日志:

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禁用批处理时，postgres 将花费更多时间来意识到它应该重用准备好的语句。

所以我决定运行性能测试来确认这一点。
我尝试将 30.000 条记录插入空数据库。
禁用批处理后，耗时 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 entityManager.clear)，时间下降到 320 毫秒。我不知道为什么hibernate的教程建议使用flush。我想这只是一个错误。

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

最佳答案

您的代码没有任何问题，并且运行正常。

我调试了它，然后我安装了 p6spy 并且它正在工作。这也是你可以测试它的方法:

  1. 在build.gradle中添加这个依赖:

    compile 'p6spy:p6spy:2.1.4'

  2. 像这样修改连接属性:

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

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

然后你会看到批处理语句:

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，表示该语句是在一个JDBC批处理中执行的。

在提到 batch 的那一列之前的列表示执行语句所需的毫秒数。 0 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 列中包含 1 或 2)用于批处理时被执行，对应第20次和第30次迭代。

关于java - 如何使用 Hibernate 和 Spring Boot 启用批量插入，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34228044/

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