Re: Number of dnsserver processes?

You should focus on increasing DNS lookup performance rather
than
squid working around it. 32 outstanding queries means there's
something substantially wrong with your DNS service.
Consider implementing a caching only DNS server on your squid
machine.

Markus

Brad Meier wrote:
>
> Blue Lang wrote:
>
> > On Tue, 17 Aug 1999, Williams Jon wrote:
> >
> > > Is there any technical reason to not modify the Squid source to increase the
> > > maximum number of DNS processes beyond 32? I'm running squid on a box that
> > > handles ~2,000,000 requests a day, and we have been gettting around 4-5
> > > messages a day saying that we've got too many queued DNS requests. I've
> > > configured 32 dnsserver processes, but that hasn't helped. I know where to
> > > change the max, but I'd like to know if there was a serious reason not to.
> >
> > Are those messages coming from squid, or from some other logging system?
> >
> > And, I have to ask.. 2 million hits? What kind of hardware are you using?
>
> They appear in cache.log, and if your link gets saturated so that DNS
> can't resolve fast enough Squid gets a FATAL error and does a shutdown.
> I had the same problem, 32 processes wasn't enough, cache is processing
> around 1.4 million requests a day, PentII 350, 512M RAM, 45Gig swap on
> 5x9Gig wide scsi. Have "upgraded" to 2.3dev2 to get around the
> shutdowns... not quite stable, but more stable than 2.2stable4 was with
> the dns congestion.
>
> Cheers
> Brad Meier
> --
> Systems Software
> University of Cape Town