mongrel_object_track.conf

gistfile1.rb

# Original code by Robert Klemme 
OUT=open("objects.log","w")
OUT.sync = true
$last_stat = nil
$run_count = 0

OUT.puts "run,classname,last,count,delta"

class ObjectTrackFilter < Mongrel::HttpHandler
  def process(request,response)
    GC.start # force a collection
    stats = Hash.new(0)
    ObjectSpace.each_object {|o| stats[o.class] += 1}

    stats.sort {|(k1,v1),(k2,v2)| v2 <=> v1}.each do |k,v|
      if $last_stat
        delta = v - $last_stat[k]
        if v > 10 and delta != 0
          OUT.printf "%d,%s,%d,%d,%d\n", $run_count, k, $last_stat[k], v, delta
        end
      end
    end

    $run_count += 1
    $last_stat = stats
  end
end

# add :in_front => true to track all requests
uri "/", :handler => ObjectTrackFilter.new, :in_front => true