Monitoring rails applications

I am curious what people use to monitor their rails applications…

Specific things I’m interested in are:

-web traffic

-detecting processing errors (currently go to log files, but ideally
would
be sent to monitoring solution)

-running database queries to see if there are new entries in the last X
minutes

-performance metrics (query performance)

-up/down detection of database/servers/etc

-history for all above

I know there are tons of products out there, but I’m just curious what
most
people are using.

Thanks,

phil

Phil,

For web traffic monitoring, you could use Google Analytics (free) or
Mint (30$/site).

Mint: (http://www.haveamint.com/)
blog article:
http://nubyonrails.com/articles/2005/12/05/mint-stats-for-your-ruby-on-rails-app
demo: http://topfunky.com/mint/

Alain