About Streaming Large CSVs in Ruby on Rails

I wanted to manipulate the data in the database and then output it to CSV, so I implemented it with reference to the following.
http://qiita.com/yutackall/items/24a4487f629a9106a971

If the size is small, it will be fine, but if there are thousands of SQL issues, there will be more SQL issues.
It will take some time for the download to be ready.
(After pressing the download button, it takes about 30 minutes for all SQL issues to finish.)
If the size is small, it can be downloaded, but if the size is large, it will not be downloaded to the browser after publishing SQL (nothing happens).

I thought that the client might have timed out, so I implemented it with the following information as a streaming distribution.
http://qiita.com/regonn/items/76fc256d48e4d77c95ef

If you do that, SQL will not run even if you press Download, and the data will be empty.
Where is the problem?I'll put the code on it.I also use Apache+Passenger.

class OutputController <ApplicationController
  def download
    self.response.headers ["Content-Type"] ||= 'text/csv;charset=Shift_JIS'
    self.response.headers ["Content-Disposition" = "attachment; filename=export_#{Time.now.to_i}.csv"
    self.response.headers ["Content-Transfer-Encoding"] = "binary"
    self.response.headers ["Last-Modified"] = Time.now.ctime.to_s
    @input=Input.find (params[:id])

    self.response_body=Enumerator.new do | yelder|
      @ input.baseurls.find_each do | baseurl |
        @baseurls=baseurl
        yelder<<(render:content_type=>'text/csv')
      end
    end
  end
end

In this case, @baseurls contains 1000 pieces of data, and I would like to pass it to download.csv.ruby in View to process 1000 pieces at a time.CSV.generate in download.csv.ruby.