Click here to monitor SSC
SQLServerCentral is supported by Red Gate Software Ltd.
 
Log in  ::  Register  ::  Not logged in
 
 
 
        
Home       Members    Calendar    Who's On


Add to briefcase

PhysicalDisk perfmon counters versus LogicalDisk counters Expand / Collapse
Author
Message
Posted Monday, June 17, 2013 5:52 AM
SSC Veteran

SSC VeteranSSC VeteranSSC VeteranSSC VeteranSSC VeteranSSC VeteranSSC VeteranSSC Veteran

Group: General Forum Members
Last Login: Monday, June 23, 2014 2:05 AM
Points: 264, Visits: 1,708
Hi,
We have a Physical disk which is partitioned into 4 drives,D,E,F,J. I am monitoring individual logical disk idle time and physical disk idle time. These are a day's average values
Counter	                                  Value
LogicalDisk(D:)\%idle time 84.92676725
LogicalDisk(E:)\%idle time 87.60788474
LogicalDisk(F:)\%idle time 94.81640539
LogicalDisk(J:)\%idle time 98.49689629
PhysicalDisk(1 D: E: F: J:)\% Idle Time 74.4477885

I noticed PhysicalDisk valueis much lower than average of LogicalDisk values,even though LogicalDisk values look good. PhysicalDisk value is suppose to be average of LogicalDisk values right? Why this variation caused?

Thank you
Post #1464098
Posted Monday, June 17, 2013 6:06 AM


Ten Centuries

Ten CenturiesTen CenturiesTen CenturiesTen CenturiesTen CenturiesTen CenturiesTen CenturiesTen Centuries

Group: General Forum Members
Last Login: Friday, June 13, 2014 10:20 AM
Points: 1,223, Visits: 9,574
IT researcher (6/17/2013)
PhysicalDisk value is suppose to be average of LogicalDisk values right? Why this variation caused?


No, I don't think that's the case. It's the % of time that the physical disk is actually idle, e.g. where all logical volumes it's supporting are idle at the same time, so it'll always be lower than the individual logical volumes.
Post #1464102
« Prev Topic | Next Topic »

Add to briefcase

Permissions Expand / Collapse