The average length of the disk queue indicates the number of read and write operations on the disk that are awaiting attention.
What is the Average Disk Queue Length?
- The longer the disk queue length, the more disk operations are awaiting.
- If this value routinely surpasses a value of 2 during SQL Server peak usage, something needs to be done about it.
- If you have numerous drives, you should divide this figure by the total number of drives in your array to determine whether it is greater than 2.
- Average wait times ought to be under 1. When the queue length is four or more, the disk is I/O bound.
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