diff --git a/app/controllers/prompts_controller.rb b/app/controllers/prompts_controller.rb
index 16277b4..09f9cd1 100644
--- a/app/controllers/prompts_controller.rb
+++ b/app/controllers/prompts_controller.rb
@@ -144,8 +144,11 @@ class PromptsController < InheritedResources::Base
 	      logger.info("Question #{@question.id} is using catchup algorithm!")
 	      @next_prompt = @question.pop_prompt_queue
 	      if @next_prompt.nil?
+		      @question.record_prompt_cache_miss
 		      logger.info("Catchup prompt cache miss! Nothing in prompt_queue")
 		      @next_prompt = @question.catchup_choose_prompt
+	      else
+		      @question.record_prompt_cache_hit
 	      end
 	      @question.send_later :add_prompt_to_queue
 	else
diff --git a/app/controllers/questions_controller.rb b/app/controllers/questions_controller.rb
index ad53d7f..689f5f7 100644
--- a/app/controllers/questions_controller.rb
+++ b/app/controllers/questions_controller.rb
@@ -64,6 +64,9 @@ class QuestionsController < InheritedResources::Base
 	      if @p.nil?
 		      logger.info("Catchup prompt cache miss! Nothing in prompt_queue")
 		      @p = @question.catchup_choose_prompt
+		      @question.record_prompt_cache_miss
+	      else
+		      @question.record_prompt_cache_hit
 	      end
 	      @question.send_later :add_prompt_to_queue
 
diff --git a/app/models/question.rb b/app/models/question.rb
index f45ce02..208f8e5 100644
--- a/app/models/question.rb
+++ b/app/models/question.rb
@@ -240,7 +240,6 @@ class Question < ActiveRecord::Base
 
   def density
       # slow code, only to be run by cron job once at night
-      the_prompts = prompts.find(:all, :include => ['left_choice', 'right_choice'])
 
       seed_seed_sum = 0
       seed_seed_total = 0
@@ -254,7 +253,8 @@ class Question < ActiveRecord::Base
       nonseed_nonseed_sum= 0
       nonseed_nonseed_total= 0
 
-      the_prompts.each do |p|
+      #the_prompts = prompts.find(:all, :include => ['left_choice', 'right_choice'])
+      prompts.find_each(:include => ['left_choice', 'right_choice']) do |p|
 	      if p.left_choice.user_created == false && p.right_choice.user_created == false
 		      seed_seed_sum += p.appearances.size
 		      seed_seed_total +=1
@@ -317,7 +317,22 @@ class Question < ActiveRecord::Base
 	  prompt = prompt_id.nil? ? nil : Prompt.find(prompt_id.to_i)
   end
 
+  def record_prompt_cache_miss
+	  $redis.incr(self.pq_key + "_" + Time.now.to_date.to_s + "_"+ "misses")
+	  $redis.expire(self.pq_key, 24*60*60 * 3) #Expire in three days
+  end
+
+  def record_prompt_cache_hit
+	  $redis.incr(self.pq_key + "_" + Time.now.to_date.to_s + "_"+ "hits")
+	  $redis.expire(self.pq_key, 24*60*60 * 3) #Expire in three days
+  end
 
+  def get_prompt_cache_misses(date)
+	  $redis.get(self.pq_key + "_" + date.to_s + "_"+ "misses")
+  end
+  def get_prompt_cache_hits(date)
+	  $redis.get(self.pq_key + "_" + date.to_s + "_"+ "hits")
+  end
 
 
 
diff --git a/lib/tasks/test_api.rake b/lib/tasks/test_api.rake
index 02e2644..38377e2 100644
--- a/lib/tasks/test_api.rake
+++ b/lib/tasks/test_api.rake
@@ -352,6 +352,25 @@ namespace :test_api do
 	end
 
 
+	#catchup specific 
+	if question.uses_catchup?
+		misses = question.get_prompt_cache_misses(Date.yesterday).to_i
+		hits = question.get_prompt_cache_hits(Date.yesterday).to_i
+
+		
+		yesterday_votes = question.appearances.count(:conditions => ['date(created_at) = ?', Date.yesterday])
+
+		if misses + hits != yesterday_votes
+		     error_msg += "Error! Question #{question.id} isn't tracking prompt cache hits and misses accurately! Expected #{yesterday_votes}, Actual: #{misses+hits}\n"
+		end
+
+		miss_rate = misses.to_f / yesterday_votes.to_f
+		if miss_rate > 0.1
+		     error_msg += "Error! Question #{question.id} has less than 90% of appearances taken from a pre-generated cache! Expected <#{0.1}, Actual: #{miss_rate}\n"
+		end
+	end
+
+
 	if error_bool
 	   error_msg += "Question #{question.id}: 2*wins = #{2*total_wins}, total votes = #{total_votes}, vote_count = #{question.votes_count}\n"
 	end
@@ -416,6 +435,7 @@ namespace :test_api do
 			 "     The prompt count matches the expected number of prompts ( num_choices ^2 - num choices) for each question\n" +
 			 "     All Vote objects have an associated appearance object\n" +
 			 "     All Vote objects have an client response time < calculated server roundtrip time\n" 
+			 "     More than 90% of prompts on catchup algorithm questions were served from cache\n" 
 
 	print success_msg
 
@@ -423,6 +443,9 @@ namespace :test_api do
      else
      	CronMailer.deliver_info_message("#{CRON_EMAIL},#{ERRORS_EMAIL}", "Error! Failure of API Vote Consistency " , error_msg)
 
+	puts "There were errors: "
+	puts error_msg
+
 	unless bad_choices.blank?
 
 		puts "Here's a list of choice ids that you may want to modify: #{bad_choices.uniq.inspect}"
--
libgit2 0.21.2