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utorrent + rapid speed decrease

M

m_three10

Weaksauce
Joined
Sep 26, 2004
Messages
90
I will be as brief and concise as possible.

Im running the latest version of utorrent and XP SP3.

My connection to my room is being run through powerline adapters which feed into a router (wrt150n) inside my house.

I have the comcast cable 10MB package.

Problem:
I have many things enabled for download, ports are fowarded properly, everything seems ok.

What im noticing is that my speeds will max out to 1.3MB (the sum of all the downloads) and then over a matter of about 5-10 minutes, my speeds will slowly decrease drastically, to the point where it will bottom out at ~100kbs.

To remedy my situation all i have to do is unplug the powerline adapter and replug it in and/or restart my router and i get full speed again, only to have it decrease shortly thereafter.

I have tried changing the ports, limiting my downloads, running very very conservative settings on utorrent as far as connections are concerned, only to no avail. My connection gets saturated as well and my download speeds suffer, only when utorrent is run. On the contrary though, my ping stays the same and i am able to play CS:S... so i find this whole predicament very odd.




I need some help, i really dont know where to go from here. All i want is the ability to pull at a steady speed. This doesnt happen inside the house via wireless, it seems. I think its only the powerline adapter, but i may be wrong.

-gabe
 
the fall off is expect, with comcasts burst once a file hits a certain amount downloaded the speeds will drop, thats what your experiencing i bet. resetting it could make comcast think that its a new file and will start downloading at that burst speed again.
 
Try forcing encryption in utorrent, just in case comcast is throttling based on traffic type.
 
Comcast is throttling connections these days. Based on use of max bandwidth for a period of 15 minutes and/or max traffic on your node. Google for comcast throttling to find the details.
 
I can't see Comcast throttling your connection to 100 KBps, that's incredibly slow.

My guess is that you're maxing out your available connections. Everything is fine until you load up uTorrent. Your TCP connections build and build until you're out of headroom. Simple way to test would be to set maximum global connection in uTorrent to something incredibly low, like 50. Another option: if you have a router that you can install DD-WRT onto, do it, and set your maximum TCP connections to something low as a control (maybe 512). If the problem persists, it's something else, but you'll still have great router firmware. :D

Edit: By the way, I also have Comcast, and when their "burst transfer" speed is over, I maintain my advertized speeds, both up and down, indefinitely. I leave my connection unthrottled all night, every night, for the last 3 years, at ~300KBps up and ~3MBps down. I have never once been throttled, cut off, or warned about quotas or limits by Comcast. I use uTorrent as well, and I'm not using encryption either.
 
I've never had comcast throttle me either, can run at 1.4MB/s down and 200KB/s up all day every day. Maybe the throttling is more common on lower connection packages?
 
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