[HELP] qBittorrent lags my internet even when all torrents paused

Windows specific questions, problems.

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scissors61
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[HELP] qBittorrent lags my internet even when all torrents paused

Post by scissors61 » Sun Feb 03, 2013 3:14 pm

I am experiencing the most bizarre thing with qBittorrent, from the moment I open it my internet slows down to a crawl to the point where it becomes unusable, pages don't load anymore or it takes forever to load (tested with Chrome, Firefox (+ Nightly) and IE10), but qbittorrent keeps running at full speed without a problem. I don't know the internal politics of how Windows handles network requests, but it feels like qbt is hogging all the network space. I tried reducing the number of connections it used, but no luck, reduced the download and upload speed, still no luck, finally I paused all the active torrents, and to my surprise, still no luck, if that's not absolutely bizarre I don't know what it is.
This has been happening on and off for quite some time now, at first I couldn't figure out what was making it lag, but then I noticed when I closed qbt, I stopped instantly having connection problems. But since the last 2.0.8 version it just happens all the time, if qbt is on, my internet stops working for everything else, period. I used both the official x86 builds and the unofficial x64 builds, but it doesn't seem to make any difference.
Currently running qBittorrent 2.0.8 x64 on Windows 7 Ultimate x64

I tried looking in the forums and googling it but there seems to be no indication of this problem to anyone else, so sorry in advance if it's a common problem, I just didn't find it. Help would be appreciated, I switched to qbt because the RSS downloader just works perfectly, I'd be pretty sad if I had to give it up.

Also, first time posting here, hello everyone!

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by Nemo » Sun Feb 03, 2013 3:54 pm

Hi there,

Did you set your upload limit? If qBittorrent uses your whole upload speed, or download speed, this can cause lags while surfing the internet. But you say when all torrents are paused.. Hmm.. Did you change any default settings maybe?
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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by tekko » Sun Feb 03, 2013 4:36 pm

Try lowering half-connection from default 50 to 5 and see if it's the cause.

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by sledgehammer_999 » Sun Feb 03, 2013 4:57 pm

And also I hope you meant version "3.0.8" and not "2.0.8"...

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by scissors61 » Sun Feb 03, 2013 10:19 pm

[quote="NeMo_0"]
Did you set your upload limit?
[/quote]
Already did that, even used 1KB/s for both download and upload, didn't help.

[quote="tekko"]
Try lowering half-connection from default 50 to 5 and see if it's the cause.
[/quote]
Yep, already did that, no luck.

[quote="sledgehammer_999"]
And also I hope you meant version "3.0.8" and not "2.0.8"...
[/quote]
Yeah, sorry, I'm using 3.0.8

I think I'm ready to call the exorcist, logic and reason has abandoned this boat.
Last edited by scissors61 on Sun Feb 03, 2013 10:25 pm, edited 1 time in total.

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by sledgehammer_999 » Sun Feb 03, 2013 10:58 pm

Do other bittorrent clients (eg ?torrent) work fine on the same machine?

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by Tomaso » Sun Feb 03, 2013 11:00 pm

This sounds exactly like the problem that I was experiencing under WinXP..
It was because of the half-open connections limit, set by M$.
I raised the limit from 10 to 100 by patching tcpip.sys, and the problem disappeared!

There are conflicting reports regarding the connection limit in Win7 though..
Some reports state that there is no limit in Win7, while others claim that the limit is set to 20.
I'm not running Win7, so I can't check this for myself.

There are several free tools that you can use to find out what the connection limit is on your system, and to change it if necessary.
Here's one called "TCP-Z":
http://deepxw.blogspot.com/2009/01/tcp-z-center.html

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by scissors61 » Sun Feb 03, 2013 11:19 pm

[quote="sledgehammer_999"]
Do other bittorrent clients (eg ?torrent) work fine on the same machine?
[/quote]
Yep, everything is working fine with uTorrent 3.2

[quote="Tomaso"]
There are conflicting reports regarding the connection limit in Win7 though..
Some reports state that there is no limit in Win7, while others claim that the limit is set to 20.
I'm not running Win7, so I can't check this for myself.
[/quote]

Yeah I've been googling around and it looks like there's no limit in Win7

ImageImage

But from the looks of it, it doesn't seem that it didn't even reach the old limit of 10, so that's definitely not the problem

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by scissors61 » Tue Feb 05, 2013 1:45 pm

Welp, thanks anyone that tried to help, but I guess this is going nowhere and I'll just have to assume I'm fucked.
As a final measure I'm going to reset to the original settings, is there a way to save the RSS downloader settings? I have a lot of stuff set up there and I don't want to do it all over again.

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by sledgehammer_999 » Tue Feb 05, 2013 4:25 pm

I think C:\Documents and Settings\<username>\Application Data\qBittorrent\qBittorrent-rss.ini holds the RSS settings. I am not sure though.

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by scissors61 » Tue Feb 05, 2013 5:43 pm

Just uninstalled, deleted the content from the appdata, deleted the keys in regedit, reinstalled and the problem still persists. At this point I have no other choice but to abandon qbt for the time being (and go back to uTorrent? Ugh...) maybe in my next reformat this problem will go away.

[quote="sledgehammer_999"]
I think C:\Documents and Settings\<username>\Application Data\qBittorrent\qBittorrent-rss.ini holds the RSS settings. I am not sure though.
[/quote]
And yeah thanks, this holds the RSS settings, although only the Download Rules, the RSS feeds themselves are someplace else.

Thanks everyone, but maybe I should be checking my laptop for curses and other bad juju, because this doesn't seem to be making any sense.

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by jeps » Tue Feb 05, 2013 7:59 pm

Not that this is going to help you in anyway, but maybe it will inspire some developer to get it fixed.

I have had a related (I think it is related) case. Suddenly all udp connection functionality was gone from my qTorrent.
Previously it had worked without a problem.
Despite I removed qTorrent and all the settings and reinstalled it never worked again.
Now I am stuck with running either µTorrent or Transmission (on my NAS).

I really hope someone will locate and fix the problem.

 

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by makimskii » Sat Jul 13, 2013 1:43 pm

same problem here. I'm running Windows 8. This thread is the only place I could find people w/ the same problem. Any updates on this?

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by Switeck » Sun Jul 14, 2013 1:48 am

Disable DHT, UPnP, and Local Peer Discovery in qBT.
Try again with global and per torrent connection limits of 50 or less.
Is this via wifi?

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Re: [HELP] qBittorrent lags my internet even when all torrents paused

Post by Switeck » Sun Jul 14, 2013 1:49 am

Oh, also disable uTP!

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