Hello, I wrote a small utility that can attach to Foreman or Foreman Proxy and start tracing ruby calls, count objects, arrays, hashes and method calls in top-like experience without restarting the application. This has been tested on CentOS7 with TFM Ruby Software Collections but with some changes the script should run on any linux OS with modern kernel.
https://github.com/lzap/foreman-tracer (If you like it, you know where is the star button!) It's a great tool for debugging production or even development deployments, either performance or memory bottlenecks can be spotted quite easily. You need to have enough columns and rows in your terminal as it does not detect it and text can easily break. If you want to see it live, watch today's demo: https://youtu.be/J1ejZaDFR8o?t=7m14s There were some requests to include this with Foreman or foreman-cli-admin. I am not doing this for now, but send me your patches and we will see. The script was written in a dirty way (copy pasting some portions), it needs more love. Send me your success stories and if I see enough of them, I can turn this into properly packaged tool with nicer interface and features. But it is still valuable tool that can help. Last two releases we had couple of performance issues here and there, this is the reason why I came up with this. If you want to read something more about SystemTap and Ruby, go here: https://lukas.zapletalovi.com/2016/08/probing-ruby-20-apps-with-systemtap-in-rhel7.html The article basically explains what foreman-tracer does under the hood. -- Later, Lukas @lzap Zapletal -- You received this message because you are subscribed to the Google Groups "foreman-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
