title: RxJava: Drop items? - Backpressure
body: <p>I use RxJava to observe clicks on several buttons. </p>
  
  <p>These subscription will invoke different functions on an object which takes several milliseconds. These functions are synchronized.</p>
  
  <p>The problem is that when too many buttons are pressed I get a backpressure exception. What would work for me would be to drop several inputs (preferrably the oldes ones). Is that possible with RxJava?</p>