title: SQL Server temp DB issue
body: <p>I am using SQL Server 2008 on Windows Server 2008. I find the temp DB mdf and temp ldf is very big (about 13G), and it is almost the same size of all other real application database files (mdf+ldf).</p>
  
  <p>My questions,</p>
  
  <ol>
  <li>What temp DB is used for?</li>
  <li>Is it normal situation that temp DB is so big? If not, any ways to clean-up temp DB without impacting system performance and reliability?</li>
  </ol>
  
  <p>thanks in advance,
  George</p>