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Thread: hIOmon SSD Performance Monitor - Understanding desktop usage patterns.

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  1. #11
    Xtreme Mentor
    Join Date
    Feb 2009
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    2,597
    Here I monitor statistics, post boot, for 30 minutes with a single SSD. I multitasked as I would normally do and opened and used the typical applications/ games that I use.



    Now I try to consider the IOPS that occurred in use vs the IOPS capability of my drive. To do this I consider average queue depth and average latency readings to get some ball park figures using the following formula:

    Queue depth*(1/.latency in ms) = IOPS (in seconds)

    Based on the average latency of 0.49ms

    • Queue depth 1 x (1/0.00049) = 2,040 IOPS
    • Queue depth 64 x (1/0.00049) = 130,612 IOPS

    My average queue depth is 1.57

    • 1.57 x (1/0.0049) = 3,204 IOPS

    My maximum IOP count occurred during boot @ 190 IOPS, but my SSD is capable of 3,204 IOPS based on average latency and queue depth.

    I know there could be a lot of variables to the averages but have I got that correct as a ball park figure?

    Last edited by Ao1; 11-01-2010 at 02:25 PM. Reason: Added total reads and writes

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