These packages work together with the Judoscale autoscaling service to scale your web and worker services automatically. They gather a minimal set of metrics for each request or job queue, and periodically report this data asynchronously to the Judoscale API.
The following data is submitted periodically to the Judoscale API:
- Node and framework versions
- Judoscale package versions
- Dyno or service name (example: web.1)
- Queue metrics
Judoscale aggregates and stores this information to power the autoscaling algorithm and dashboard visualizations.
Note: The reporter will not run if the JUDOSCALE_URL environment variable is missing (such as in development or a review app). This environment variable is set for you automatically on Heroku when you install the Judoscale add-on.
Once installed, you should see something like this in your development log:
[Judoscale] Reporter not started: JUDOSCALE_URL is not set
In your production app where you've installed Judoscale, you should see this in your logs:
[Judoscale] Reporter starting, will report every 10 seconds
If you don't see any Judoscale logging, check the following:
- Make sure a Judoscale package is present in your
Package.lockfile, and restart your app. - Make sure Judoscale is one of the first middlewares for your app.
You can see more detailed (debug) logging by setting the environment variable JUDOSCALE_LOG_LEVEL=debug on your deployed application. Here's how you would do that on Heroku:
heroku config:set JUDOSCALE_LOG_LEVEL=debug
Reach out to [email protected] if you run into any other problems.