Re: FATAL: Too many queued dnsserver requests

From: Henrik Nordstrom <hno@dont-contact.us>
Date: Mon, 28 Jun 1999 20:39:52 +0200

Patrick McManus wrote:

> it appears as though you're recommending injecting traffic faster into an
> already congested network..

Not really.

The problem is that if some often used part of the DNS tree is congested
then Squids dnsserver processes will also be congested and to your Squid
users the whole internet seems randomly congested when visiting new
addresses, even those parts where there is no DNS congestion.

Squid is smart enough to not have more than one outstanding DNS query
for each host name at a time (600 seconds timeout), so it does not
really inject a noticeable amount of requests to the congested part. It
only allows for a greater margin to be able to continue processing if
some parts of the internet gets congested.

If the congestion is at the local DNS server then you have problems.

--
Henrik Nordstrom
Spare time Squid hacker
Received on Mon Jun 28 1999 - 15:20:43 MDT

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