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download speed and PC lag


oUrTorrent

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I notice that at times when I am getting over 1MB/sec in utorrent, my PC starts to lag a bit. is it possible there can be to much data for my pc to handle? It will happen even if I have nothing else running, even background processes. if I try to load say firefox, the PC stops responding for a few seconds, same with webpages. but the same thing still happens with non-internet applications. I'm not running anything special, just a 2.4Ghz A64, 3GB PC3200 6444MB/s 50.2ns, two 7200rpm HD's, one for downloads, one for OS and applications.

I also noticed the other day when I closed utorrent after downloading/seeding, and loaded up a multi player game, I had some serious lag spikes in my netgraph which went away after a few minutes. could utorrent be the cause of this? I didn't check any of the incoming connections, but I suspect that maybe after disconnecting all of a sudden, peers might still be sending packets my way and I'm getting flooded?

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If you've set uTorrent's half open connection rate too high, Windows overloads and even after shutting down uTorrent it may take a couple minutes to clear up. ...aggrievated worse by new connections coming in of peers/seeds trying to recontact you even after shutting down uTorrent.

A reboot would clear that up...but that's possibly slower than just waiting. :(

Check your uTorrent settings vs. your line speed as well. Upload may be set too high or something. :(

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my max half open is set to 100, but even a setting on 50 makes no difference. in utorrent I have it set at 80.

I am on a static IP, so maybe a reboot won't work so well. my upload is always set half my max upload.

but I really am more worried about the slow downs when downloading than the small lag after closing utorrent.

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I am using XP pro, I've reset to default of eight, we'll see if it does anything.

EDIT: I'm not one for premature judgment, but setting max half open connections in utorrent to default seems to have helped quite a bit. are there are guides on tweaking utorrent for speed/performance?

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There is no need to increase half open... http://utorrent.com/guides.php

"Performance"?? What do you mean. Know how bittorrent works, and know how you want to use uT. I for example run 20 peers per torrent PERIOD because I run alot of torrents. I have a default upload slot of 1, and only increase that on new(er) torrents I want to get faster. I routinely re-seed long dead torrents (The earliest torrent I've got is from June 2004) so I have set many things lower than default and turned off many other things. Also following http://forum.utorrent.com/viewtopic.php?id=15992 best practices for troubleshooting can be applied to someone in particular situations. For instance people who have a quota should keep DHT globally off, and ONLY turn it on when necessary. While small, that small trickle increases over time to a large amount.

I'm truly not sure what kind of "optimization" you're looking for.

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