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PerfMon counters: % above 100

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NilsBevaart

NilsBevaart

Programmer
Apr 14, 2003
53
NL
Hi all,

I am running a performance monitor against our servers to get an overview of potential bottlenecks in performance. One of the counters I'm looking at is the physical disk.

I am looking at % Disk Read Time, % Write Time and the queue lenght. What I find puzzeling is that the % Read time far exceeds 100 at a busy time. It doesn't last long and the average queue length is high, but not alarming. My question is how a percentage can be above 100. What am I measuring? What can I conclude from this?

Thanks for any tips.

Nils Bevaart
 
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