Re: [SLUG] slowdown

From: Matthew Rogers (matt@runithard.com)
Date: Tue Feb 12 2008 - 11:41:23 EST


How does the system PERFORM when you turn off the bittorrent client?

Your initial problem was performance.

On Tue, 2008-02-12 at 11:26 -0500, Eben King wrote:
> On Tue, 12 Feb 2008, Matthew Rogers wrote:
>
> > Eben King wrote:
> >> Something's using up CPU time on my machine, but nothing shows in top nor
> >> gkrellm's strip charts, nor does any unusual network use show up in
> >> gkrellm. But bash and trn take seconds to start and exit, and the CPU speed
> >> is a constant 2.4G (normally it falls back when nothing's happening). How
> >> can I find out what it is? I can get network bandwidth from the
> >> internet-facing router for everyone combined (which is mostly me), for
> >> periods from 1m - 5h.
>
> > sar 5 5
>
> eben@pc:~$ sar 5 5
> -bash: sar: command not found
>
> > will give all sort of information. Sounds like you are rooted and have
> > become a spam bot. Do a netstat and see how many out going connections you
> > have going at once. netstat -ta.
>
> I see a bunch of connections like these:
>
> tcp 1 1 pc:36973 77.247.176.136:www LAST_ACK
> tcp 1 1 pc:40262 77.247.176.154:www LAST_ACK
> tcp 1 1 pc:35394 77.247.176.136:www LAST_ACK
> tcp 1 1 pc:35507 77.247.176.136:www LAST_ACK
> etc.
>
> eben@pc:~$ host 77.247.176.136
> Host 136.176.247.77.in-addr.arpa not found: 3(NXDOMAIN)
> eben@pc:~$ host 77.247.176.154
> Host 154.176.247.77.in-addr.arpa not found: 3(NXDOMAIN)
>
> That's probably something to do with the torrents. How do I make the system
> break protocol and forget those connections? "ifdown eth0 ; ifup eth0"
> doesn't do it.
>
> There aren't that many active connections, and none of them are to
> mail-related ports:
>
> eben@pc:~$ netstat -ta | grep EST (minus the ones for gaim)
> tcp 0 48 pc:36111 CPE0002a557ac9a-C:11219 ESTABLISHED
> tcp 0 0 pc:50457 bas1-toronto43-12:13765 ESTABLISHED
> tcp 0 28290 pc:36116 ABTS-TN-dynamic-0:39600 ESTABLISHED
> tcp 0 17 pc:43343 59.96.137.124:13598 ESTABLISHED
>
> In fact if I quit bittorrent, they all go away.
>

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