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Collection of Consise Munin plugins for Rails server environments. This will make monitoring your rails app a piece of cake.

This project containse munin plugins that not only work in munin, but are also concise (see references). Most things in this repository rely heavily on the request-log-analyzer gem.

What's in the box?

  • passenger_status - Running, active and maximum number of passenger instances as well as sessions.

  • rails_database_time - Min, avg, max of database times.

  • rails_request_duration - Min, avg, max of the total request durations.

  • rails_request_error - Application errors and process blocker counters.

  • rails_requests - Get, put, post and delete requests.

  • rails_view_render_time - Min, avg and max view render times.

For screenshots, head over to:


The plugins follows the default munin installation scheme:

git clone git://
cp munin-plugins-rails/rails_requests /usr/share/munin/plugins/
chmod +x /usr/share/munin/plugins/rails_requests
ln -s /usr/share/munin/plugins/rails_requests /etc/munin/plugins/rails_requests
vi /etc/munin/plugin-conf.d/munin-node

Paste the configuration from the documentation of rails_requests into the munin-node file.

env.log_file '/path/to/production.log'
user www-data
command /usr/local/bin/ruby %c

Run “/etc/munin/plugins/rails_requests autoconf” and “/etc/munin/plugins/rails_requests” to test the plugin.

For more detailed information, see the documentation embedded in the plugin. Each plugin is packed with an example config and a ln -s you can copy.


  • sudo gem install request-log-analyzer

  • Check if the paths in the plugin configuration are correct.

  • Make sure the specified user is allowed to write to /tmp and access your rails logfile.

If you encounter performance problems with your app, please take a look at the request-log-analyzer wiki on examples on how to drill down to the core of your problem. If you want to hire an expert, please visit us at or mail me at:

Happy monitoring!

Additional information