One of the fundemental tools needed when taking your Rails app to production is a way to track response times. Unfortunately, theres no free, easy, open source way to track them for small or medium apps. Skylight, Honeybadger, Sentry, AppSignal, etc. are great, but they are are closed source and there should be an easy open source alternative where you control the data.

ActiveInsights hooks into the ActiveSupport instrumention baked directly into Rails. ActiveInsights tracks RPM, RPM per controller, and p50/p95/p99 response times and charts all those by the minute. It also tracks jobs per minute, their duration, and latency.

Add this line to your application's Gemfile:

gem "activeinsights"

And then execute:

$ bundle

Or install it yourself as:

$ gem install activeinsights

And then install migrations:

bin/rails g active_insights:install
bin/rails rails db:migrate

This also mounts a route in your routes file to view the insights at /insights.

You can supply a hash of connection options to connects_to set the connection options for the Request model.

config.active_insights.connects_to = { database: { writing: :requests, reading: :requests } }

You can supply an array of ignored endpoints

config.active_insights.ignored_endpoints = ["Rails::HealthController#show"]

After checking out the repo, run bin/setup to install dependencies. Then, run rails test to run the unit tests.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, execute bin/publish (major|minor|patch) which will update the version number in version.rb, create a git tag for the version, push git commits and tags, and push the .gem file to GitHub.

Bug reports and pull requests are welcome on GitHub. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.