What is a good average disk queue length?

10-20ms
10-20ms is average. Over 50ms is bad. For both Current and Avg. Disk Queue Length, the higher the number the more disk operations are waiting.

What disk queue length is too high?

Disk latency above 25 ms can cause noticeable performance issues. Latency above 50 ms is indicative of extremely underperforming storage. Disk queues should be no greater twice than the number of physical disks serving the drive.

What is AVG disk queue length in perfmon?

Tracks the number of requests that are queued and waiting for a disk during the sample interval, as well as requests in service. As a result, this might overstate activity. If more than two requests are continuously waiting on a single-disk system, the disk might be a bottleneck.

How do I improve disk IO performance in Windows?

How can I improve I/O performance?

Start the registry editor (regedit.exe)
Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management.
Double click IoPageLockLimit.
Enter a new value. This value is the maximum bytes you can lock for I/O operations.
Close the registry editor.

What is Avg Disk sec transfer?

The Avg. Disk sec/Transfer counter measures the average time of data reads and writes on the disk. The Avg. Disk sec/ Transfer counter is made up from both read and write disk Transfer requests.

How do I optimize my disk speed?

The following tips can help in boosting the speed of your hard drive.

Scan and clean your hard disk regularly.
Defragment your hard disk from time to time.
Reinstall your Windows Operating System after every few months.
Disable the hibernation feature.
Convert your hard drives to NTFS from FAT32.

How do I find my disk queue length?

Go to server –>CMD–>perfmon –>ADD –>Physical Disk [performance object]–> AVG disk Queue lenth[counter]. If you don’t have anything setup before the problem to have a baseline the counters won’t help you much (if at all).

https://www.youtube.com/watch?v=L3V1FBr70Xw