lsof, and friends are powerful tools, most of the time you should not start with them. This section is a brief recap of the techniques typically used to troubleshoot a problem with a Ruby process.
Without a doubt, the most popular way to investigate an unexpected behavior in a Ruby program is to add a
raise some_object.inspect statement or a
puts some_object.inspect statement in the code and rerun the same test or use case. Quick and dirty...and terribly efficient (especially the
raise version: It is easy to spot, and you won’t forget to remove it).
Rails has a variant for HTML rendering in a view: the
debug() function. This function outputs the ...