title: What does "BufferSize" represent in a log4j appender?
body: <p>In org.apache.log4j Class AsyncAppender public void setBufferSize(int size)</p>
  
  <pre><code>Sets the number of messages allowed in the event 
   buffer before the calling thread is blocked (if blocking is true) 
  or until messages are summarized and discarded. Changing the size 
  will not affect messages already in the buffer. 
  </code></pre>
  
  <p>I have configured 10,000. But the file continues grow also after 10K!
  What is the reason?</p>