title: Why is the SLAB service warning of dropped events for my ETW event source?
body: <p>I'm getting this error on one of my servers:</p>
  
  <pre><code>EventId : 806, Level : Warning, Message : Some events will be lost because of bu
  ffer overruns or schema synchronization delays in trace session: Microsoft-Seman
  ticLogging-Etw-Mobile2ConsoleListener., Payload : [sessionName : Microsoft-Seman
  ticLogging-Etw-Mobile2ConsoleListener] , EventName : TraceEventServiceEventsWill
  BeLostInfo, Timestamp : 2014-02-28T10:38:46.6527952Z
  </code></pre>
  
  <p>I have another server which I <em>think</em> is set up identically. However, when I run the ETW SLAB service to listen for ETW events emitting from my event source I get the above warning but not on the other server. What would cause this?</p>