# Monitoring Rails applications **URL:** \ **Category:** Rails\ **Created:** [November 22, 2008, 1:20pm UTC](https://www.ruby-forum.com/t/monitoring-rails-applications/153887 "2008-11-22T13:20:02Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Lennart\_K](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/6de8d8/32.png) [@Lennart\_K](https://www.ruby-forum.com/u/Lennart_K)\ **Post date:** [November 22, 2008, 1:20pm UTC](https://www.ruby-forum.com/t/monitoring-rails-applications/153887/1 "2008-11-22T13:20:02Z")
Hey everyone, I have a question to all those who use Rails in a professional way and have to monitor their applications: What values do you monitor? And how? I don’t mean the health values of the machines or the network. I mean just the Rails applications. I would think of number of logged in users, memory/CPU usage of Mongrel threads, page requests, concurrent sessions, number of queries, avg. response times of queries and cache stuff. Thank you! So long Lennart K. ---
**Author:** ![Lennart\_K](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/6de8d8/32.png) [@Lennart\_K](https://www.ruby-forum.com/u/Lennart_K)\ **Post date:** [November 22, 2008, 1:32pm UTC](https://www.ruby-forum.com/t/monitoring-rails-applications/153887/2 "2008-11-22T13:32:21Z")
Monit: [Easy, proactive monitoring of processes, programs, files, directories, filesystems and hosts | Monit](http://mmonit.com/monit/) for all your system process monitoring needs Munin: [http://munin.projects.linpro.no/](http://munin.projects.linpro.no/) because people always love pretty graphs! New Relic: [http://www.newrelic.com/](http://www.newrelic.com/) Nothing gives you more detail about how your application is performing in the wild. Those three will give you pretty much anything you could possibly want to know. Jason On Sat, Nov 22, 2008 at 7:19 AM, Lennart K.