Disk queue length windows 2008

My backup targets are bigger arrays, 16 drive RAID 10 affairs, so likewise a queue length of 20 wouldn't be worrying. The reason I ask is I've seen 24 drive arrays of little GB or 1. If you have 4 drives in a RAID5 and they're nearline 3. What kind of controller is it on? I've been using capacitor backed controllers since , 4GB of cache or more can really help with cushioning the blow of heavy disk usage.

If you don't already have a large power backed cache on your controller, it might be helpful to add one. It shouldn't be too expensive, unless you have zero budget. As a more radical change, if you don't need that much disk space, you could reconfigure the array to RAID10 and see a dramatic improvement in array performance. Disk Queue Length. For both Current and Avg. Disk Queue Length, 5 or more requests per disk could suggest that the disk subsystem is bottlenecked.

If the requests per second counter shows a high count, this could indicate low memory issues, and low memory could cause disk performance issues if the disk subsystem has to continuously process paging operations. If the previous interval of the Current Disk Queue Length matches the performance data for the current interval, then the Avg. Disk Queue Length data is an accurate representation of your storage system condition.

However, if the Avg. Disk Queue Length is greater than 2 per hard disk for a prolonged period of time, it may produce a bottlenecked system. Community Bot 1. Wes Price Wes Price 2 2 bronze badges. Add a comment. Active Oldest Votes. Queue lentsh are sort of very hard to judge. Definitely not an Oracle issue - your disc subsystem is bottlenecking.

Improve this answer. TomTom TomTom TomTom, many thanks for your reply. This has helped me understand more of the problem and can now progress further. Whatever the case, it sounds like you are already pushing your storage to its very limit.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Windows Server and up has Resource Monitor, which allows you to see what operations are occurring on the disk. The disc subsystem just being too pathetic to handle the load. Check whether anything special goes on during those times.

If not - maybe jsut get a cheap SSD ;. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Learn more. Asked 9 years, 8 months ago. Active 1 year, 11 months ago. Viewed 42k times. Anyone got any thoughts on what might cause that huge queue length? Improve this question.