Good day Niclas,
sorry for long time answer
About your recommendations
1.
The longest response time for the syslogs device is 10 milsec. In the PEAK(really small time)
2-3
I attach our cfg file for answer on last questions.
And you right, we lose performance when not have peak load.But we don't lose performance(we had normal response time for operations), we have problem only with longer ROLLBACK.