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List: kfm-devel
Subject: Re: Interesting thing with DNS requests
From: Mario Weilguni <mweilguni () sime ! com>
Date: 2006-12-07 15:46:45
Message-ID: 200612071646.45388.mweilguni () sime ! com
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Am Donnerstag, 7. Dezember 2006 00:31 schrieb Thiago Macieira:
> Fredrik Johansson wrote:
> >I thought there must be something quite wrong somewere, so I started to
> > watch the IO traffic through eth0 using wireshark. And the result was
> > very different on the DNS requests, the HTTP was about the same.
> >
> >konqueror: 656 DNS packets 479 HTTP packets
> >Firefox: 42 DNS packets 442 HTTP packets
> >
> >I dont know if I have set up something in a wrong way (upgraded from
> > Dapper) or if I dont understand the info I retrived.
> >
> >Oh and I have keep cache in sync setting in both browsers
> >
> >The wireshark captures are here:
> > http://mumme.se/wireshark_capture.tar.gz
> >
> >Can anybody else confirm/not confirm the above? I don't want to post a
> > bug ticket if the error is my side.
>
> Don't post a bug ticket about DNS problems there because I won't do
> anything about it. It's not a bug. DNS servers are supposed to reply
> fast.
>
> If you don't have a fast DNS server available, install a caching
> nameserver like nscd.
I still think DNS caching in kio might be necessary. Long ago, I had the same
problem with a page with many pictures on it, and konquerer did way too much
DNS lookups.
Of course this is a problem, even a small latency of 30ms for a DNS lookup
will be noticeable if 650 requests are going over the wire.
Best regards,
Mario Weilguni
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