All server JVMs stats

for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {
 VirtualMachine vm = VirtualMachine.attach(vmd);
 String javaHome = vm.getSystemProperties().getProperty("java.home");
 File managementAgentJarFile = new File(javaHome + File.separator + "lib" + File.separator + "management-agent.jar");
 vm.loadAgent(managementAgentJarFile.getAbsolutePath());
 String address =  vm.getAgentProperties().getProperty("com.sun.management.jmxremote.localConnectorAddress", null);
 JMXServiceURL jmxUrl = new JMXServiceURL(address);
 MBeanServerConnection conn = JMXConnectorFactory.connect(jmxUrl).getMBeanServerConnection();
 MemoryMXBean memBean = ManagementFactory.newPlatformMXBeanProxy(conn,
   ManagementFactory.MEMORY_MXBEAN_NAME, MemoryMXBean.class);
 RuntimeMXBean rtBean = ManagementFactory.newPlatformMXBeanProxy(conn,
   ManagementFactory.RUNTIME_MXBEAN_NAME, RuntimeMXBean.class);
 int memUsage = (int)(100.0 * memBean.getHeapMemoryUsage().getUsed() /  memBean.getHeapMemoryUsage().getMax());
 long memMB = memBean.getHeapMemoryUsage().getMax() / 1024 / 1024;
 System.out.println(rtBean.getSystemProperties().get("user.dir")+ " => " + memUsage +"% mem,   max="+memMB+"MB");
}