针对低性能硬件优化spring boot

Question

我想为一个低性能的硬件优化一个Spring引导。我只是将JDBC用于SqlLite数据库。看起来一开始就浪费了5分钟，我不确定在哪里或者为什么。如果有人有什么建议的话。我看到了其他的想法，但我不确定它是否适用于我的情况，我的表现是覆盆子Pi 1。

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 :: Spring Boot ::        (v2.3.2.RELEASE)
2021-08-02 14:18:55.075  INFO 24149 --- [           main] com.app.AppGatewayApplication  : Starting AppGatewayApplication v0.0.1-SNAPSHOT with PID 24149 (/opt/app/app.jar started by root in /opt/app)
**2021-08-02 14:18:55.261  INFO 24149 --- [           main] com.app.AppGatewayApplication  : No active profile set, falling back to default profiles: default
2021-08-02 14:22:46.915  WARN 24149 --- [           main] io.undertow.websockets.jsr               : UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used**
2021-08-02 14:22:51.668  INFO 24149 --- [           main] io.undertow.servlet                      : Initializing Spring embedded WebApplicationContext
2021-08-02 14:22:51.671  INFO 24149 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 230771 ms
2021-08-02 14:23:37.337  INFO 24149 --- [           main] o.f.c.internal.license.VersionPrinter    : Flyway Community Edition 6.5.5 by Redgate
2021-08-02 14:23:45.163  INFO 24149 --- [           main] o.f.c.internal.database.DatabaseFactory  : Database: jdbc:sqlite:data/app.db (SQLite 3.32)
2021-08-02 14:23:49.716  INFO 24149 --- [           main] o.f.core.internal.command.DbValidate     : Successfully validated 19 migrations (execution time 00:02.585s)
2021-08-02 14:23:49.962  INFO 24149 --- [           main] o.f.core.internal.command.DbMigrate      : Current version of schema "main": 1.1.19
2021-08-02 14:23:50.027  INFO 24149 --- [           main] o.f.core.internal.command.DbMigrate      : Schema "main" is up to date. No migration necessary.
2021-08-02 14:23:51.952  INFO 24149 --- [           main] com.app.repository.e                     :  Connection  - - - - - - - -  New DBConnection created

Answer 1

除非您知道造成时间损失的原因，否则很难提高性能。

因此，我将首先增加日志级别，以了解在此期间到底发生了什么。一旦明确了这一点，您就可以考虑如何提高性能了。

此外，从2.4版开始，Spring Boot提供了一些方法来了解在服务启动期间发生了什么，以及每一步需要多长时间。例如，您可以在这里找到一些关于如何将此监视构建到您的服务中的提示：https://www.amitph.com/spring-boot-startup-monitoring/