When I asked for tools to profile Rails apps, someone pointed at DTrace. Since I work on MacOSX stations and deploy on OpenSolaris, it is a valid way to go. But I have little kn
This is probably way too late to be useful, but Adam Leventhal's DTrace boot camp presentation is great for getting started:
http://blogs.oracle.com/roller/resources/ahl/dtrace_course.2005.8.18.pdf