Don't understand perfmon Graph

Posted on 2011-05-03
Last Modified: 2012-05-11
I'm new to using perfmon but need to know how to use it correctly because I suspect that the disks storing my Virtual Machine's on my Hyper-v Server are not good enough.

I ran perfmon on my Windows 7 machine to test it but I don't fully understand scaling on the line chart itself. I've attached a screenshot. Okay stupid question is the virtual line on the left hand side of the graph going from 0 to 100 represent percentages or second's or what? I know I'm supposed to use counters Avg.Disk sec/Read and Avg.Disk sec/Write to measure disk performance but first I need to understand the graph and what the 0 to 100 represents!

Question by:makel2
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    Expert Comment

    LVL 11

    Expert Comment

    by:Pradeep Dubey
    Read the graph from the right to the left, 0 means disk utilization is low (according to your selection Disk I/O, read or write counter), 100 for maximum use of the disk accordingly.

    Author Comment

    Okay so on the graph 0 to 100 represents seconds? I think you mean read left to right?
    LVL 13

    Accepted Solution

    It says your disk is fine, no need to upgrade the RPM for that amount of data.

    It is simply showing the end of the results first up to the red line... then it shows the beginning up to the initial point as a.. jus in case you wanted to know.

    The important part is that the disk utilization is low and there is nothing to worry about.
    LVL 13

    Assisted Solution

    Oh 0-100% disk utilization.
    LVL 50

    Assisted Solution

    makel2--When you open Performance Monitor, you will see several links at the bottom of the window.  They contain quite a bit of information about using Perfmon.

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