A background scheduled task I am trying to run on heroku is failing because it gets out of memory. I needed to use a ruby memory profiler to understand exactly what the issue was. ruby-prof seemed great, but it needs a patched ruby interpreter to collect memory information.
After a bit of searching and trying, the simplest thing I managed to do was to
- download the ruby sources
- patch them
- create a ruby-build package definition with them
- install with rbenv
Here is a script that does this for ruby 1.9.2-p125 and gcdata patch.