title: Ruby on Rails caching with memcache and Dalli doesn't seem to work
body: <p>so I implemented some caching on my page that runs on rails 3.3 but when I look into the production log I see this:</p>
  
  <pre><code>Read fragment views/#&lt;Job:0xbbb6970&gt;_big_2 (0.8ms)
  Write fragment views/#&lt;Job:0xbbb6970&gt;_big_2 (0.5ms)
  Read fragment views/#&lt;Job:0xbbb65d8&gt;_big_2 (0.5ms)
  Write fragment views/#&lt;Job:0xbbb65d8&gt;_big_2 (0.6ms)
  Read fragment views/#&lt;Job:0xbbb61b4&gt;_big_2 (0.6ms)
  Write fragment views/#&lt;Job:0xbbb61b4&gt;_big_2 (0.4ms)
  Rendered shared/_jobslist.html.erb (88.5ms)
  </code></pre>
  
  <p>I am not sure this is supposed to be like this :) As far as I understand it, it should read all the time once the fragment is saved in cache. I specified an expiration of 30 minutes. </p>
  
  <pre><code>&lt;% jobs.each_with_index do |job, i| %&gt;                                         
      &lt;% cache("#{job}_big_2", :expires =&gt; 30.minutes) do %&gt;
         ...
  </code></pre>