QoS - realtime traffic must be less than one-third of link bandwidth capacity

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSWAN_40.html
Below is an extract from this document:
Cisco Technical Marketing has done extensive testing and has found that a significant decrease in non-realtime application response times occurs when realtime traffic exceeds one-third of link bandwidth capacity. Extensive testing and customer deployments have shown that a general best queuing practice is to limit the amount of strict priority queuing to 33% of link bandwidth capacity.
Have people found this to be their experience?
IE. have you seen cases where realtime traffic is > 33% of link bandwidth and the non-realtime traffic gets badly affected?
Thankyou, MH

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Posting
"misunderstanding" - yes and no
No, you're correct about Cisco's warning. If you have a 3 Mbps, and assigned 2 Mbps to LLQ and it's using it, effectively you have a 1 Mbps link for your remaining traffic. This is what Cisco is warning about. But, whether that would be a real issue or not, depends on the needs of that other traffic now reduced to only 1 Mbps.
Yes, you might misunderstand about "3x". This is something I'm warning you about, not Cisco. If your LLQ traffic "needed" 2 Mbps, but there's only 3 Mbps total, some LLQ traffic may suffer. It too depends on the actual needs of your LLQ traffic. For something like CBR VoIP g.711, this may not be a problem, but for VBR traffic, like VoIP g.729, or many video codecs, this can be a problem. Basically, you need bandwidth to borrow from during transient bursts. (Also, LLQ normally has an implicit policer, but policers also allow bursts, so again, you need to insure there's sufficient "excess" bandwidth.)
The worst case example would be 2 Mbps LLQ on a 2 Mbps link. I'm sure you can understand "other" traffic might be starved of all its bandwidth, but the LLQ traffic, if VBR, will often behave badly too.

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SharePoint 2010, Visual Studio 2010, Packaging a solution - The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.

Hi,
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Error 2 The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters. C:\VS2010\ProjectsOverflow\DetailedProjectTimeline\VisualDetailedProjectTimelineWebPart\Features\Feature1\Feature1.feature VisualDetailedProjectTimeline
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Message Edited by tmunsell on 07-28-2008 09:18 PM
Todd Munsell
Turbine Engine Test Technician/IT Tech
Wood Group Pratt & Whitney Industrial Turbine Services, LLC
Plattsburgh, NY
Attachments:
labvdr7.zip ‏891 KB

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QoS - realtime traffic must be less than one-third of link bandwidth capacity

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