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java - Hibernate 和 DispatcherServlet 初始化的关系

问题描述

我们有一个 Spring Boot 应用程序，它的启动时间对我们来说是一个劣势；它正在减慢 CI/CD 进程。它的启动时间约为 140 秒；

我研究了如何增加 Spring 启动时间，并阅读了Spring 有多快？博客和相关的 stackoverflow帖子。但是，这些对我们没有帮助，因为实际问题不同。例如，只有 DispatcherServlet 初始化在约 60 秒内完成。因此，我研究了 DispatcherServlet，发现它与 Spring 完全相关；只是一个 FontController，所以它应该比当前版本更快。

但是，在 DispatcherServlet 初始化时，我看到休眠打开了一个连接并提交了一些东西。休眠提交大约需要 50 秒，而整个 DispatcherServlet 初始化大约需要 60 秒。

然后，我进行了调试，发现在 DispatcherServlet.initHandlerMappings() 调用时发生了提交，但我不能走得更远。

你知道为什么 DispatcherServlet 初始化需要这么多时间吗？

日志文件中有关 DispatcherServlet 初始化的一部分：

2021-04-16 14:47:12 INFO    1  DispatcherServlet | Initializing Servlet 'dispatcherServlet'
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 WARN    1  NamedQuery | Finder method public abstract java.util.List com.example.TestRepository.getTestList1(org.springframework.data.domain.Pageable) is backed by a NamedQuery but contains a Pageable parameter! Sorting delivered via this Pageable will not be applied!
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 WARN    1  NamedQuery | Finder method public abstract java.util.List com.example.TestRepository.getTestList2(org.springframework.data.domain.Pageable) is backed by a NamedQuery but contains a Pageable parameter! Sorting delivered via this Pageable will not be applied!
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:16 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:17 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:47:17 DEBUG   1  TransactionImpl | begin
2021-04-16 14:47:17 INFO    1  p6spy | #1618573637572 | took 152ms | statement | connection 1| url jdbc:p6spy:firebirdsql:localhost/8080
SELECT 1 FROM TEST_QUERY
SELECT 1 FROM TEST_QUERY;
2021-04-16 14:47:17 DEBUG   1  TransactionImpl | committing
2021-04-16 14:48:03 INFO    1  EndpointLinksResolver | Exposing 15 endpoint(s) beneath base path '/app'
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 DEBUG   1  TransactionImpl | On TransactionImpl creation, JpaCompliance#isJpaTransactionComplianceEnabled == false
2021-04-16 14:48:04 INFO    1  DispatcherServlet | Completed initialization in 52429 ms

标签： javaspringspring-bootperformancehibernate

解决方案

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