Bind 9 is slow?

John Klos john at
Thu Mar 17 18:35:08 UTC 2005

>>  Recently I have installed a secondary DNS server (Bind 9.2.3, on Sun
>>  E450, single CPU and 512 MB RAM), It is working but when I try to
>>  nslookup it takes 2 to 3 seconds to reply.

> You defenitly have a problem. A time of 2 or more seconds to resolve a query
> is very unusual. I would think, it might be a timeout-problem, maybe a wrong
> entry in your /etc/resolv.conf

I've seen something similar on hosts which didn't have IPv6 set up 
properly. "Properly" often just means not having an IPv6 default route, so 
that any attempts to do transport over IPv6 fail instantly and IPv4 is 
used instead.

Performancewise, I'm seeing BIND 9 queries answered in hardly any time 
even on my slowest machine, which is a VAXstation 4000/60:

[tonka:~] john% time host
Using domain server:
Address: 2001:470:1f01:325:a00:2bff:fe17:9131#53
Aliases: has address
0.000u 0.010s 0:00.16 6.2%      0+0k 0+0io 0pf+0w

John Klos

More information about the bind-users mailing list