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monitor your rack apps in production
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NOTE: This repository is no longer supported or updated by GitHub. If you wish to continue to develop this code yourself, we recommend you fork it.


Some tiny middleware for monitoring Rack apps in production.

  • RackStatsD::RequestStatus - Adds a status URL for health checks.
  • RackStatsD::RequestHostname - Shows which what code is running on which node for a given request.
  • RackStatsD::ProcessUtilization - Tracks how long Unicorns spend processing requests. Optionally sends metrics to a StatsD server.

Note: The request tracking code isn't thread safe. It should work fine for apps on Unicorn.

This code has been extracted from and is used on currently.