Rack::Probe : dtrace probes for your webapp
Rack::Probe (along with Dtracy) is part of the Ruby on Rail's Google Summer of Code '09 Quartet, with development updates and entertainment available at
http://ecin.tumblr.com Welcome! Sit down, grab a sugary drink, and enjoy the smell of freshly baked code right out of the oven.
An operating system with support for Dtrace (http://www.sun.com/bigadmin/content/dtrace/) is a must. Mac OS X, Solaris/OpenSolaris and FreeBSD are all acceptable choices, though no testing has been done on FreeBSD.
gem sources -a http://gems.github.com
gem install ecin-rack-probe
Inside your config/environment.rb
config.gem "ecin-rack-probe", :lib => "rack/probe"
Inside your rackup file
From a terminal, run
dtrace -n rack*::: -l to get a list of all the available probes. The number you'll see after 'rack' in the provider field is the PID of the process that's making the probes available.
Copyright (c) 2009 ecin. See LICENSE for details.