From: Perry Smith <pedzsan@...>
Date: 2011-10-09T01:54:02+09:00
Subject: [ruby-core:40058] Statistical Profiling

Would it be plausible to somehow, get the (ruby) stack of the running ruby process (or a particular thread), periodically?  For example, every 10 seconds.

One approach might be to have a separate thread with a timer that popped and it would get the current stack for a particular thread (not itself).

The overall objective is to have a very light weight (low impact) technique for profiling a Rails app as it is running in production.  Over the course of a week, for example, gather enough statistics to understand where the app is spending the most time.

Of course, the other question is: has this already been done?  (I couldn't find anything.)

Thank you for your time,
pedz