I have been monitoring Physical Disk/Disk Queue Length and System/Processor Queue Length (PQL). Reading the description of PQL it says a sustained queue of over 2 should be addressed. Ours sits anywhere from 4-7 sometimes as high as 15. SQL Server is quites speedy on this box, it is the only use of this server. I have received no complaints from users.
Is the suggested number of 2 by Windows really accurate if the box is running SQL Server?