How to set up JVM startup parameters for idea?

2 years ago
Liam
2 minutes

You can configure JVM startup parameters using command line arguments or by configuring them in the startup script.

  1. Command line parameter configuration:
    Configure JVM startup parameters using the -D parameter in the command line. For example:
  2. Execute your application by passing a parameter value using the -D flag in Java.
  3. Startup script configuration:
    If you are using a startup script to launch the application, you can configure JVM startup parameters in the script. For example, in a Linux system, the startup script can use the following configuration:
  4. Set the JAVA_OPTS environment variable with the parameters specified and run your application using the JAVA_OPTS.

Here are some commonly used JVM startup parameter configurations:

  1. -Xms: Sets the initial size of the heap.
  2. -Xmx: Specifies the maximum size of the heap.
  3. -Xss: Specify the size of the thread stack.
  4. – XX:PermSize: Specifies the initial size of the Permanent Generation.
  5. – XX:MaxPermSize: Specifies the maximum size of the permanent generation.
  6. -XX:NewSize: Specifies the size of the young generation
  7. -XX:MaxNewSize: Specifies the maximum size of the young generation.
  8. – XX: SurvivorRatio: Sets the ratio between Eden and Survivor regions in the new generation.
  9. -XX:MaxTenuringThreshold: This configures the maximum age of objects in the young generation.
  10. -XX:CMSInitiatingOccupancyFraction: Sets the threshold for the heap memory usage percentage at which the CMS garbage collector is triggered to run.
  11. – Enable Parallel Garbage Collector: Use parallel garbage collector.
  12. – Enable CMS garbage collector with option “-XX:+UseConcMarkSweepGC”.
  13. -XX:+PrintGCDetails: Print detailed information of the garbage collection.

You can choose the appropriate JVM startup parameter configuration based on the needs and performance requirements of the application.

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