The following disables ngStat logging serverside, which means there's no directories to clean out, as well as map switches should be a bit faster.
[Engine.StatLog]
LocalBatcherURL=
LocalBatcherParams=
LocalStatsURL=
WorldBatcherURL=
WorldBatcherParams=
WorldStatsURL=
LocalLogDir=../Logs
WorldLogDir=
bLogTypingEvents=False
bWorldBatcherError=False
I finally found this again here:
http://forums.gameservers.com/viewtopic.php?p=141819&sid=ce68029fe2983972618c7801c1177ef4 , and want to make sure I don't lose it again, so figured I'd throw it up here
