Run application via gradlew with -Xmx and -Xms

问题

I have an application. I run it via

gradlew run-app

Or debug

gradlew debug-app

It works. How do I pass '-Xmx' argument into the application which I run (debug)? Is it possible to do so without edditing build.gradle file?

I found this Gradle unknown command-line option '-X'

I get a similar error when I try

gradlew debug-app -Xmx2000m

Error

FAILURE: Build failed with an exception.

* What went wrong:
Problem configuring task :debug-app from command line.
> Unknown command-line option '-X'.

I tried to create a file gradle.properties in GRADLE_USER_HOME directory (by default, it is USER_HOME/.gradle).

org.gradle.jvmargs=-XX\:MaxHeapSize\=4256m -Xmx4256m -Xms2000m

I also tried to org.gradle.jvmargs=-Xmx2000m in project folder gradle.properties.

And even then when I run an application, I see Commited Memory size is < 520 MiB

And this is when I run it as a normal Java App

In the second case, when I run the application as a normal Java app with -Xms, -Xmx, Commited Memory size is about 3.5 GiB because I passed -Xmx4512m -Xms2512m parameters.

回答1:

Add this in your gradle.properties file :

org.gradle.jvmargs=-Xmx2000m

From here

org.gradle.jvmargs

Specifies the jvmargs used for the daemon process. The setting is particularly useful for tweaking memory settings. At the moment the default settings are pretty generous with regards to memory.

edit : my answer what about the gradle daemon jvm, not the app jvm. You have to use the jvmArgs property

The extra arguments to use to launch the JVM for the process. Does not include system properties and the minimum/maximum heap size.

回答2:

Using application plugin one can use applicationDefaultJvmArgs property

apply plugin: 'application'    
applicationDefaultJvmArgs = ["-Xms1024m", "-Xmx2048m"]

The arguments will be applied to run task and to start script of your application

more info

回答3:

Firstly, thanks @ToYonos for leading me to the right direction.

Secondly, I found the solution here https://stackoverflow.com/a/9648945/4587961. I ran my app from command line.

set GRADLE_OPTS=-Xms1724m -Xmx5048m
gradlew debug-app

Note, CMD Windows command SET works locally, so if you close your terminal, GRADLE_OPTS will not be set. For Linux, you can use

export GRADLE_OPTS=WHATEVER

This is what I wanted to achieve.

来源：https://stackoverflow.com/questions/44701947/run-application-via-gradlew-with-xmx-and-xms

标签

gradle

memory-management

jvm

gradlew