gradlejvmbuild.gradle

Increase heap memory for 'gradle test'

I have a problem running 'gradle test' against my Spring Boot application as I see signs of GC called too many times and my tests fail likely due to delays caused by agressive GC work.

How I can tell gradle to use more heap memory allowed for JVM during test phase, or in general?

Solution

  • You can use the maxHeapSize configuration of the Test task.

    Example in Gradle/Groovy:

    test {
  minHeapSize = "128m" // initial heap size
  maxHeapSize = "512m" // maximum heap size
  jvmArgs '-XX:MaxPermSize=256m' // mem argument for the test JVM
}

    Or the same in Kotlin:

    withType<Test> {
  minHeapSize = "512m"
  maxHeapSize = "1024m"
  jvmArgs = listOf("-XX:MaxPermSize=512m")
}

    Check out the official docs for additional info.