title: What is "Audit Logout" in SQL Server Profiler?
body: <p>I'm running a data import (using C#/Linq), and naturally I'm trying to optimize my queries as much as possible.  To this end I'm running a trace on the DB using SQL Server Profiler, with my trace filtered by my SQL login name (it's a name that can uniquely be attributed to my data import process).</p>
  
  <p>Strangely enough, most of my SQL statements are really quick :) - very few queries even break over the 1ms mark.  But spaced in between all my queries are several rows where the EventClass is "Audit Login" or "Audit Logout" - and the duration of an "Audit Logout" can be up to a minute!</p>
  
  <p>Has this got something to do with the fact that I'm using transactions in my import?  If so, is there any way to find which are the big-hitting queries so I can clean those up?</p>