Plugins - request-log-analyzer
Add to favoritesSimple command line tool that can analyze the contents of a production log file. It will produce the most requested action, the actions that take most time to complete, mongrel process blockers, etc. Use this output to find out what part of your code needs optimization.
Usage
Invocation is very easy: request-log-analyzer mongrel.0.log mongrel.1.log mongrel2.log
The tool can be used to create a SQLite database of all the requests as well, so you can query for yourself:request-log-database mongrel.0.log mongrel.1.log mongrel2.log --database requests.db
See the project wiki on github for more information.
Installation
gem sources -a http://gems.github.com
sudo gem install wvanbergen-request-log-analyzer
http://github.com/wvanbergen/request-log-analyzer/wikis
git://github.com/wvanbergen/request-log-analyzer.git
Rails' (MIT)
Statistics and Logs

Nice plugin! So simple and so functional! The HTML is quite ugly, but unfortunately IE is not Firefox and it can't render rounded corners directly with CSS! Good workaround! :D