java memory check - 자바 메모리 확인

  static Runtime runtime = Runtime.getRuntime();
 
  public static void main(String[] args) {
    // -Xmx
    long max = runtime.maxMemory() / 1024 / 1024;
 
    // -Xms
    long total = runtime.totalMemory() / 1024 / 1024;
 
    long free = runtime.freeMemory() / 1024 / 1024;
    
    System.out.println(String.format("Max: %,dMB, Total: %,dMB, Free: %,dMB, Used: %,dMB", max, total, free, total - free));
  }

결과

Max: 1,796MB, Total: 123MB, Free: 121MB, Used: 2MB