This is more of an FYI regarding enabling the Perf log as shown below. I've noted on two systems that setting the EnablePerformanceLogs to 1 (and restarting the FillDB service) continues to log. Removing the key all together continues to log. I wanted to ask for confirmation from others.
Value: C:\Program Files (x86)\BigFix Enterprise\BES Server\FillDBData\FillDBPerfLog.txt
Value: 1 (setting it to 0 deactivates it)