title: Setting smallfiles option for controlling journaling doesn't control the size
body: <p>I am using mongodb 2.0 for my development environemnt .
  i am starting mongodb with the following below configuration through a config file .</p>
  
  <pre><code>replSet = ubsc
  fork    = true
  port    = 27017
  dbpath  = /data/mongodb
  logpath = /data/mongodb/mongodb.log
  rest = true
  smallfiles = true
  </code></pre>
  
  <p>My question is that even though i am setting the option of generating smallfiles for the journaling through setting (smallfiles = true ) in my config file .</p>
  
  <p>I accessed the application only for 5 minutes ,  (5-10 minutes ) , the file inside the journal folder has grown to a huge size </p>
  
  <pre><code>[mark_user@ubsdvf.oitreo.com journal]$  ls -lrt
  total 393632
  -rw------- 1 s606970 s606970 134217728 Oct 21 07:41 prealloc.1
  -rw------- 1 s606970 s606970 134217728 Oct 21 07:46 prealloc.2
  -rw------- 1 s606970 s606970        88 Oct 21 08:42 lsn
  -rw------- 1 s606970 s606970 134217728 Oct 21 08:42 j._0
  </code></pre>
  
  <p>Please let me know why the file has grown to a huge size ??</p>