Changed setting

app/controllers/top_controller.rb

 class TopController < ApplicationController
   def index
-    @latest_jobs = Job.latest_jobs.take(5)
-    @top_cities = City.sort_top_cities.take(9)
+    @latest_jobs = Job.latest_jobs.take(Settings.top.job.limit)
+    @top_cities = City.sort_top_cities.take(Settings.top.city.limit)
   end
 end

config/settings.yml

 import_job:
   csv_file: db/Venjob.csv
+
+top:
+  job:
+    limit: 5
+  city:
+    limit: 9