http://blogs.msdn.com/velocity/archive/2009/06/29/troubleshooting-velocity-series-iii-continued.aspxHow to control ETW sessions and collect traces In this section I will describe how to work with an ETW sink. ETW stands for “Event Tracing for Windows”. It is a high speed tracing facility provided by the OS. It uses buffering and logging mechanism implementeden-USCommunityServer 2.1 SP1 (Build: 61025.2)