title: Problems with Nginx php-fpm and Memcached
body: <p>I have an website wich is getting more traffic as usual in the past months.
  I want this website to server more users in the same amount of time without changing the Hardware.
  At the Moment i use Apache2 with Wordpress and Memcached.
  I wanted to know if i can use Nginx to get more performance on this site.
  When i have Nginx running on the Webserver with Wordpress and i run a test with 10000 users over a period of 60 seconds, i get only 600 succesfull answers the other 9400 connections get Errors. (mostly timeout). <a href="http://rusty.info/images/ap-ng/Nginx+WP.PNG" rel="nofollow">IMG</a><br>
  when i use Memcached additionally to the previous configuration i get 9969 successfull Answers, but the maximal users per second dont go over  451 <a href="http://rusty.info/images/ap-ng/Nginx+WP+Memcached.PNG" rel="nofollow">IMG</a><br>
  But on my Site i have sometimes over 1000 Users per second.
  So can anybody tell me what im doing wrong?</p>
  
  <p>System:<br>
  AWS EC2 Cloud Server 2GHz, 650MB RAM<br>
  Ubuntu 13.10<br>
  Nginx 1.4.7<br>
  Memcached 1.4.14<br>
  Php-fpm for php 5.5.3</p>