Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Physical Disk - Average Disk Queue Length

Posted on 2009-07-07
2
2,252 Views
Last Modified: 2012-06-27
Hi,
    I have a question about the "Physical Disk - Average Disk Queue Length" windows performance counter.
     
     I have a physical disk (500GB @ 7200 rpm) on my host machine (H:). I have installed Virtual Server witch a .vhd virtual disk that is located to the same physical disk mentioned above. (H:).
     Does anyone have any idea why, when performing high disk activity inside the Virtual machine, opening the Perfmon from inside the Virtual machine, the AVG disk queue length for the drive has a value of 5 but the Perfmon from the Host OS shows only 0.9. Both PerfMons are ran at the same time.


Thanks for your answers

0
Comment
Question by:rares_dumitrescu
2 Comments
 
LVL 9

Accepted Solution

by:
DCMBS earned 500 total points
ID: 24799119
The Physical Disk - Average Queue length shows the number of transactions queued up by the O/s and waiting to be flushed to disk.  The fact that thye Virtual machine has a higher count than the Host bindicates the O/s on the VM is having to wait to pass the requests to the host.
0
 

Author Comment

by:rares_dumitrescu
ID: 24817560
makes sense, thanks
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to update Firmware and Bios in Dell Equalogic PS6000 Arrays and Hard Disks firmware update.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question