Change the ruby process name in top

Question

I would like to change the name of the ruby process that gets displayed in the linux/unix top command. I have tried the

$0=\'miname\'

approach

Answer 1

I had a similar problem, updated the technique from the Dave Thomas post a little by putting it in a rack middleware, rather than the before/after pattern.

Put this in lib/rack/set_process_title.rb:

# Set the process title to the URI being processed 
#- useful for debugging slow requests or those that get stuck
class Rack::SetProcessTitle
  def initialize(app)
    @app = app
  end
  def call(env)
    $0 = env['REQUEST_URI'][0..80]

    @status, @headers, @response = @app.call(env)

    $0 = env['REQUEST_URI'][0..80] + '*'

    [@status, @headers, @response]
  end
end

... and this goes at the end of config/environment.rb:

Rails.configuration.middleware.insert_after Rack::Lock, Rack::SetProcessTitle

More words in the blog post: http://blog.actbluetech.com/2011/06/set-your-process-name-in-top-and-ps.html