Maven - increase memory for JVM

Question

I have tried multiple ways to increase the given memory for the JVM.
The OS is: Ubuntu 18.04.03 LTS
To start the program I use the exec-maven-plugin. I start it with following command: mvn clean compile exec:java.

However I need more memory.
To check the given memory for the jvm I use: Runtime.getRuntime().maxMemory(). (Currently it's 32gb, 120gb are on the system)

To increase it I have tried multiple things.

Using the surefire plugin:

<plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.5</version>
        <configuration>
            <argLine>-Xmx102400m</argLine>
        </configuration>
</plugin>

System.out.println(Runtime.getRuntime().maxMemory()) still prints 32gb.

set MAVEN_OPTS="-Xmx102400m"
mvn clean install -DargLine="-Xmx102400m"
(To be honest I don't even have an idea why this should work.)

I can't use intellij or eclipse to increase the jvm memory, since the program runs on a server.
I don't have any idea left and I can't find an other solution on the web.

I think your question is answered in great detail at https://stackoverflow.com/q/23701207/1523342. — mthmulders, Aug 28 '20 at 14:40
You know this `-Xmx102400m` mean `102GB`, because each `1m` it is equal to `1 MB`. Do you have `102 GB` of memory in your computer? — noNihongo, Aug 28 '20 at 14:51
Why don't you just build an executable jar and then run it with `java`? — J Fabian Meier, Aug 28 '20 at 15:55
Really using such an extreme old version of maven-surefire-plugin? — khmarbaise, Aug 28 '20 at 18:08

score 2 · Answer 1 · answered Aug 28 '20 at 14:43

2

This argument should do the trick: -Drun.jvmArguments="-Xmx512m -xms1024"

answered Aug 28 '20 at 14:43

Richard Marto

63
8

you mean to expand the compile command? Like this: ```mvn clean compile exec:java -Drun.jvmArguments=" "```? If so, it still doesn't work. – wewep Aug 28 '20 at 15:04

Maven - increase memory for JVM

1 Answers1