# Bonus: Telemetry

Pronghorn provides awesome automatically generated graphs of your application that you can view in your web browser. It updates live, displaying data flow, volume, and more.

## Enable Telemetry in HelloWorldPronghorn

To enable telemetry in our HelloWorld app, go to HelloWorldPronghorn.java and edit the start method to look like this:

```java
private static void start(GraphManager gm) {
    gm.enableTelemetry(8000);
    StageScheduler.defaultScheduler(gm).startup();
}
```

�Run the app, and observe the output on the console:

```
[main] INFO com.ociweb.pronghorn.stage.scheduling.StageScheduler - Targeted threads in use 8, fixed limit with fixed script. NOTE: More threads may be used use to graph complexity and telemetry usage.
[main] INFO com.ociweb.pronghorn.network.NetGraphBuilder - building server graph
[main] INFO com.ociweb.pronghorn.stage.scheduling.GraphManager - total count of stages including telemetry 12 
[main] INFO com.ociweb.pronghorn.stage.scheduling.ScriptedFixedThreadsScheduler - actual thread count 6
[main] INFO com.ociweb.pronghorn.stage.scheduling.ScriptedFixedThreadsScheduler - priority thread 11:HTTP1xRouter,6:ResourceM,12:Order,4:SSocketW,9:DotM,10:SummaryM

Telemetry Server is now ready on http://172.16.10.28:8000/
Telemetry Server max connections: 4096
Telemetry Server max concurrent inputs: 8
Telemetry Server concurrent tracks: 1
Telemetry Server max concurrent outputs: 2
0672 ms total startup time.

Hello World, Jon Snow!
```

It provides you with a link containing the telemetry. Open up the URL in your web browser:

![Screenshot of the telemetry for HelloWorldPronghorn](https://2919393935-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDw-Wj3OHa9HNcujxFJ%2F-LEAOIZznMHUCjVchWVG%2F-LEAZ_9F1lnG65bF5RL0%2Fscreenshot.jpeg?alt=media\&token=7fa57e34-9698-420c-b0d6-69d1c5932f5a)

Does this look familiar?

![](https://2919393935-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LDw-Wj3OHa9HNcujxFJ%2F-LEAOIZznMHUCjVchWVG%2F-LEAZfb8WusWDkpUAPUe%2Fimage.png?alt=media\&token=2da45c42-4b8b-426d-b18a-1a64e0369967)