Re: Stop - Start - Stop - Start

On Mon, 16 Feb 1998, Bruce Campbell wrote:

> On Mon, 16 Feb 1998, David Richards wrote:
>
> > I have a problem that concerns me. Squid seems to work fine then,
> > it will stop serving requests, eventually though, it will continue and
> > serve the request.
>
> Hmmm, sounds like DNS lookups (normally what ours pause for anyway).

I don't think ours is DNS lookups. Because it can pause for up to
minutes sometimes, and in that time I can ping the site to check if it is
responding, and yes it does.

>
> > When I do a "tail -f access.log", it seems to pause. A lot of the
> > time it seems to do it after an ICP_QUERY but, that may just be a
> > co-incidence, because I have seen it on non-ICP requests. This event is
> > occurring on all three of our proxies, and I find that more often that not
> > this event is occuring on two of three proxies simultaneously [No spell
> > checker in pine :-) ]
>
> q: when multiple proxies block at the same time, is it only on an ICP
> query, or on a normal end-user query (handled by that proxy)

Yes it seems to be on an ICP query most times, not all time however.

>
> q2: If it is on an ICP query, is it just between them only, or to the
> QuestNet proxies as well?

We are currently not using the Questnet proxies as parents, currently they
are just way too overloaded and slow.

>
> q3: anything consistent in the URL's being requested around such an error?
> (remember, it could be before or after the log entry it pauses on.)

No nothing. There is not consistency between HTTP headers either. On an
intereseting note, we are using a variant of the authenitcation code.

>
> > What is going on?
>
> No idea to be honest ;)
>
> --==--
> Bruce.
>
> Systems Administrator
> Hub Communications.
>
> (*laugh* a mere 100 metres between QUT and us, and 12 hops (via sydney)
> network-wise)
>

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David Richards Ph: +61 7 3864 4347
Network Programmer Fax: +61 7 3864 5272
Computing Services E-mail: dj.richards@qut.edu.au
Queensland University of Technology
Brisbane, Australia
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Received on Tue Feb 17 1998 - 15:30:27 MST