How to get MemoryUsage statistics for a java Process object

Question

Is it possible to get the current RAM usage of a java Process that is created with Runtime.getRuntime().exec(...);. I am creating a minecraft server instance and I need to monitor the resource usage of the server.

Here is exactly how I am creating the process.

private void runStartCommand(){
    try {
        lines = new ArrayList<>();
        String cmd = "cmd.exe /c cd " + service.getLocation() + "& java -jar -Xmx2G -Xms2G "+service.getLocation()+"spigot-1.9.2.jar";
        process = Runtime.getRuntime().exec(cmd);
        input = new BufferedReader(new InputStreamReader(process.getInputStream()),8*1024);
        writer = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
        running = true;
    } catch (IOException e) {
        e.printStackTrace();
    }

}

No. currently it is running on Windows on my computer and in the future it will run on Centos and Windows servers — IcyRelic
– IcyRelic, Commented Jun 14, 2016 at 6:05
Probably worth Googling for powershell commands to do something equivalent to unix's 'top' command then grep for the process. superuser.com/questions/176624/… — Samuel Toh
– Samuel Toh, Commented Jun 14, 2016 at 6:08
Shelling out from Java to launch another Java process is... not such a great practice. Better to add the other Java process as a dependency to your project, and start a new Thread that invokes its main() method. This greatly reduces the JVM overhead, means you're not restricted to one OS, and makes it much easier to monitor and control the other process. — BobMcGee
– BobMcGee, Commented Jun 15, 2016 at 14:08

BobMcGee · Accepted Answer · 2016-06-14 06:10:20Z

2

Bukkit already provides a custom plugin for monitoring and managing Minecraft server performance that should suit you perfectly.

Usually you would use something like Java Melody or a JMX console to monitor the application server process. You can also instrument and monitor it with the built-in VisualVM.

answered Jun 14, 2016 at 6:10

BobMcGee

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2 Comments

Samuel Toh Over a year ago

Sounds like a great solution. +1 for it

IcyRelic Over a year ago

What im doing is creating a Gaming Control Panel so adding a plugin be useful to me

CiroRa · Accepted Answer · 2016-06-14 06:02:37Z

0

http://linux.die.net/man/1/dstat

if you are under linux, you can try dstat. We use it to take control over cpu, disk e ram usage

answered Jun 14, 2016 at 6:02

CiroRa

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tirpitz.verus · Accepted Answer · 2016-06-14 06:09:55Z

0

You could try to run systeminfo but you should really consider not doing it from Java but running some other tool (your could use nagios) on the OS - that way your monitoring isn't dependent on the app you're running.

answered Jun 14, 2016 at 6:09

tirpitz.verus

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1 Comment

IcyRelic Over a year ago

Im creating a control panel for multiple game servers so managing it within the control panel would be essential

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