# File src/ruby_supportlib/phusion_passenger/admin_tools/memory_stats.rb, line 67
      def apache_processes
        @apache_processes ||= begin
          if PlatformInfo.httpd
            processes = list_processes(:exe => PlatformInfo.httpd)
            if processes.empty?
              # On some Linux distros, the Apache worker processes
              # are called "httpd.worker"
              processes = list_processes(:exe => "#{PlatformInfo.httpd}.worker")
            end
            processes
          else
            nil
          end
        end
      end