I still cant tell what the buffer write time is, it's clearly not 30 seconds. Are these questions I need to be calling into support for?
I did disable the log buffer and it didn't seem to impact the box from what I can see.
Log buffering helps reduce the I/O required by MWG.
In the early days we had customers disable log buffering and suffer huge performance issues. I think the checkbox might even be superfluous now (it does nothing -- logs are always buffered).
I'm not sure what the buffer time is though... it might just be based on volume (kb,mb,etc...)