Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

A java application I'm using keeps crashing, when I had a problem with a similar application I managed to fix it by allocating more of my RAM to Java. How do I do that?

(I recently upgraded to 16 GB RAM, after installing Java.)

I'm on an iMac running Mac OSX 10.6.6.

share|improve this question

1 Answer 1

java -Xmx1024M -Xms1024M -jar *filename*.jar

Xmx is the max amount you want to allocate (in MB) and the Xms is the initial amount. You can replace the 1024 with the amount you prefer.

share|improve this answer
    
can i change it to permanently increase the RAM given to java whenever i run call a .jar file? –  Kirstin Apr 12 '11 at 7:53
    
@Bec, no, you can't do this across the board to any .jar. –  jzd Apr 12 '11 at 11:01
    
@Bec The only way I could think that you could do that is IDE specific. I use NetBeans and I know you can edit NetBean's config file and tell it to use more RAM. I assume you could do the same with other IDE's. But as for setting a specific amount using the command line, I believe jzd is correct. –  Ryan Apr 12 '11 at 17:10
    
Also, this is only for .JAR applications that can be run headless, without GUI. for applications that cannot, you are screwed. does JAVA have a magnificent solution for this since it cannot be set across the board (which is fairly stupid IMO for above mentioned reason...)? –  Michael Trouw May 28 '13 at 14:54
1  
@MichaelTrouw not correct, you can increase memory for any Java application, regardless whether they run headless or with a GUI. Ryan's solution is JAVA's standard way to increase the memory. That said you should bear in mind that a lot of application server and IDE's come with their own config file to pass the -Xmx argument to the JVM. Check the documentation of your software vendor. –  Stefan Haberl Sep 5 '13 at 8:02

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.