Re: Default caching bind config very slow??
Eloy A. Paris wrote:
>
> Same here: "who" takes quite a bit of time to run because it seems to be
> trying to do a reverse DNS lookup. There is something strange here
> because I have a local named process that serves my IN-ADDR.ARPA zone
> so reverse lookups should be local and that should be pretty fast.
>
> Anyone has any ideas of what's going on with "who"?
>
> Thanks,
>
> E.-
>
> Donovan Baarda <abo@minkirri.apana.org.au> wrote:
>
> : I am using bind as a caching name server and have found that it seems to
> : be very slow when doing reverse DNS lookups. In particular, it seems to be
> : only caching them for about 5 minutes, and is very slow (up to 2 minutes)
> : when it is not in the cache. It first showed up when using "who" with
> : people telnet connected. "Who" likes to show the hostname telneted from.
>
> : Another thing interesting is the hostnames that are being looked up are in
> : my /etc/hosts file, but still take ages. An strace of who shows that "who"
> : is doing something with the hosts file, and then trying "named" and timing
> : out and retrying a few times before it completes. There is nothing
> : reported in my logs.
Ditto here. I just upgraded our main office's slakware machine to
Debian 1.3.1 and got complaints right away about "who" slowness.
--
Jens B. Jorgensen
jjorgens@bdsinc.com
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