We're running TeamCity with about 15-20 projects all hitting a SVN repository that's hosted on Windows. The authentication is done via the SSPI module in apache. We're having some performance problems with the SVN server, its getting constantly pegged and is blocking out our developers. We suspect the problem is caused by SSPI, though we're uncertain. Does anyone have experience using SSPI on their SVN server with TeamCity? Any similar problems?