Re: [Debian-NYC] debugging network slowness
On Wed, Dec 15, 2010 at 4:57 PM, Daniel Kahn Gillmor
<dkg@fifthhorseman.net> wrote:
> On 12/15/2010 04:10 PM, steve beltzer wrote:
>> However, I really would like to be able to start using Debian more and I am
>> wondering what can be done to get my browser up to speed.... Is it some
>> sort of mis-communication between Iceweasel and my internet connection?
>
> i understand being frustrated -- it certainly sounds frustrating to me!
>
> to recap:
>
> * we've been using http://nytimes.com as the test site
>
> * during these tests, there has been no detectable shortage of
> resources on the local machine (disk I/O well below capacity,
> filesystems nowhere near full, lots of free RAM and idle CPU).
>
> * iceweasel on debian takes minutes to load the Times' front page,
> though firefox under Win7 takes around 15 seconds.
>
> * wget takes far too long to do something as simple as loading an http
> redirect. (15 seconds just to fetch the redirect from
> http://nytimes.com/ to http://www.nytimes.com/)
>
> * DNS on its own does not seem to be the problem: directly querying the
> local nameservers with dig returns results very quickly (~0.02 to 0.04
> seconds), and all three nameservers in resolv.conf are at comparable speeds.
>
> * TCP connections on their own do not seem to be the problem: using
> netcat to connect to the times' site and fetch the same 302 redirect is
> also trivially quick (less than a tenth of a second)
>
> * The behavior depends on which network you are using (the cafe works
> fine; home and eyebeam were problematic).
>
> * You have Atheros ethernet controllers: wired AR8132 (rev c0) and
> wireless AR9285 (rev 01)
>
> Is this all correct? I confess i'm a bit stumped. I'd be inclined to
> try network packet captures next, but i don't really know what i'd be
> looking for.
>
> Anyone have any other suggestions?
>
> --dkg
>
>
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Stupid question, has anyone thought to run traceroute while there are
megaslow network conditions? (My apologies if so, as I haven't been
following closely.)
Cheers,
Brian
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