title: Apache access log
body: <p>I want to ask what does the last number on each request in the access log mean?</p>
  
  <p><code>127.0.0.1 - - [27/Jul/2014:12:49:31 +0300] "GET /battleWS/startServer/11 HTTP/1.1" 200 159</code></p>
  
  <p>In this case it is <code>159</code>, occasionally it's empty <code>-</code> (dash). Can someone tell me what this is? Thanks!</p>