Disk Queue Lengthįor both Current and Avg. Green= Current Disk Queue Length Blue= Avg. Disk Queue Length is a derived value and not a direct measurement. Disk Write Queue Length) requests that were queued for the selected disk during the performance data interval. “\Local Disk\Average Disk Queue Length” is the average number of both read (Avg. ![]() Multi-spindle disk devices can have multiple requests that are active at one time but other requests are awaiting service. This is an immediate record, not an average over the time interval like Average Disk Queue Length. It also includes requests in service at the time of the data collection. ![]() “\Local Disk\Current Disk Queue Length” is a direct measurement of the number of requests present at the time that the performance data is collected. This article describes two Windows Performance Monitor disk queue length counters- Current Disk Queue Length and Average Disk Queue Length-identifies potential problems, and provides basic solutions.
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