뚱2's Story

힙사이즈 조절

$cp /Applications/IntelliJ IDEA 13.app/bin/idea.vmoptions ~/Library/Preferences/IntelliJIDEA13/idea.vmoptions
$vi ~/Library/Preferences/IntelliJIdea13/idea.vmoptions

-Xms2048m
-Xmx2048m
-XX:MaxPermSize=512m
-XX:ReservedCodeCacheSize=128m
-XX:+UseCompressedOops

링크 : http://viralpatel.net/blogs/getting-jvm-heap-size-used-memory-total-memory-using-java-runtime/

/**
* Class: TestMemory
* @author: Viral Patel
* @description: Prints JVM memory utilization statistics
*/
public class TestMemory {
     
    public static void main(String [] args) {
         
        int mb = 1024*1024;
         
        //Getting the runtime reference from system
        Runtime runtime = Runtime.getRuntime();
         
        System.out.println("##### Heap utilization statistics [MB] #####");
         
        //Print used memory
        System.out.println("Used Memory:"
            + (runtime.totalMemory() - runtime.freeMemory()) / mb);
 
        //Print free memory
        System.out.println("Free Memory:"
            + runtime.freeMemory() / mb);
         
        //Print total available memory
        System.out.println("Total Memory:" + runtime.totalMemory() / mb);
 
        //Print Maximum available memory
        System.out.println("Max Memory:" + runtime.maxMemory() / mb);
    }
}