title: aws rds binlog file missing
body: <p>Sorry this question could be very basic but I couldn't find anything to fix the issue.</p>
  
  <p>I have an aws rds and when I try to get my binlog list it's only show me the 2 latest one.  </p>
  
  <pre><code>SHOW BINARY LOGS;  
  'mysql-bin-changelog.008387', '463'
  'mysql-bin-changelog.008388', '120'
  </code></pre>
  
  <p>it's always show me the 2 latest one 
  is that means the other files purged ? if yes how can I prevent to do it ?</p>