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Spring Cloud Config Server - 1.4.2.RELEASE

Java 8

I have a vanilla Spring Cloud Config Server (POM below). Main features used are:

  • downloading config files from Git
  • encryption/decryption through an SSH file

When I start it up with no memory constraints it cranks up to 7460.88 Mb.

When I add constraints like below, it is at 3653.82 Mb.

-Xms256m -Xmx256m -Xmn96m -XX:+UseNUMA -XX:+UseG1GC -XX:+AlwaysPreTouch -XX:+PerfDisableSharedMem -XX:+ParallelRefProcEnabled

As you can tell by my memory constraints I was expecting it to hang out around 256 Mb.

  • Was this an unrealistic expectation?

  • Is there a way to get it down further?

    <?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>

<groupId>any.group</groupId>
<artifactId>spring-cloud-config-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>spring-cloud-config-server</name>
<description>Spring-Cloud-Config-Server that loads configuration from GIT for Spring Boot Applications.</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.10.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>1.4.2.RELEASE</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
        <version>${spring-cloud.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Flavouski
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  • I ran the same Jar locally, same config, Mac (using Oracle, commandline) vs RHEL (OpenJDK and running as a service). Couldn't run the exact same memory retrieval command, but Mac says its using 430Mb. I have no idea what is going on. – Flavouski Mar 22 '18 at 16:28
  • Ubuntu (OpenJDK, nohup) was running around 630mb. I switched RHEL to Oracle rather than OpenJDK, but it is about the same (3647.96 Mb) – Flavouski Mar 22 '18 at 20:49

1 Answers1

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Nevermind, believe I was calculating the memory wrong.

I was using this command originally: https://stackoverflow.com/a/44711589/4681044

But instead now I used the "top" command and got the percentage and used that against the total available and got 492Mb.

Flavouski
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