[英]How can I start spring boot application in docker with profile?
[英]How can i decrease Spring Boot application memory usage in Docker?
我有一个问题,为什么非常简单的Spring Boot应用程序会分配100 MB RAM? 如何减少内存使用量?
1) https://start.spring.io/生成具有“ Spring Web Starter”依赖项的演示程序
2)Dockerfile
FROM openjdk:8-jre-alpine
ADD /target/demo.jar demo.jar
EXPOSE 8080
ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -jar /demo.jar"]
的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<finalName>demo</finalName>
</build>
类
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
package com.example.demo;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/app")
public class AppRestController {
@GetMapping(value = "/test")
public ResponseEntity<String> health() {
return new ResponseEntity<>("test OK!", HttpStatus.OK);
}
}
1)内存测试1
docker build -f dockerfile -t演示
docker run -p 8080:8080演示
码头工人统计
内存使用量/限制
101.5MiB / 989.4MiB
2)使用JVM键的内存测试2
码头工人停止dc9305c42d09
docker run -p 8080:8080 -e JAVA_OPTS =“-Xmx50M -Xms50M”演示
码头工人统计
内存使用量/限制107.2MiB / 989.4MiB
内存使用情况相同。 我该如何减少呢?
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