1 second delay - more detail and specifics

[Wayne Walker]

OK,

db, via the search, resolves to db.gns.gnumber.com, which is a CNAME for
gnumber1.gns.gnumber.com.

If I do "time host db" it takes 1.024 seconds when pointed to 127.0.0.1.
If I do "time host db.gns.gnumber.com" it takes 0.012 seconds when pointed to 127.0.0.1.
Why the big delta????? search gns.gnumber.com should make these lookups
identical, or make it two lookups.

If I do "time host db" it takes 0.020 seconds when pointed to 207.200.55.226.
If I do "time host db.gns.gnumber.com" it takes 0.020 seconds when pointed to 207.200.55.226.
Since search make this the first or second lookup, this is what I'd
expect.

entire /etc/named.conf:
-------------------------

options {
        directory "/var/named";         // use /var/named
        pid-file "/var/run/named/named.pid";
        listen-on port 53 { 127.0.0.1; };
};

zone "0.0.127.IN-ADDR.ARPA" {
        type master;
        file "127.0.0";
};

zone "." {
        type hint;                      // used to be specified w/
"cache"
        file "root.servers.hints";
};

include "/etc/dns.keys.conf";
-------------------------

resolv.conf:
-------------------------

; generated by /sbin/dhclient-script
search gns.gnumber.com
nameserver 127.0.0.1
nameserver 207.200.55.226
nameserver 66.98.210.85
nameserver 12.96.160.115
-------------------------

On Mon, May 30, 2005 at 02:42:53AM -0700, Bryan Irvine wrote:
> You should post your conf files.  Won't get far without those.
> 
> --Bryan
> 
> On 5/28/05, Wayne Walker <wwalker at bybent.com> wrote:
> > I have a number of servers that need fast lookups.  I set up BIND named
> > on each one weeks ago, and changed /etc/resolv.conf to have 127.0.0.1 as
> > the first nameserver line.
> > 
> > They were running fine with ~500 ms lookups the first time for any host
> > in our domain.  Subsequent lookups for the same host were always in the
> > 7-15 ms range!  :)
> > 
> > Starting yesterday, at least 2 of the servers are now getting an
> > addition full second of delay talking to the local DNS servers.
> > 
> > If I run "time host db", I get 0.020 when pointed to an external server,
> > I get 1.024 or 1.025 when pointed to 127.0.0.1.
> > 
> > Any ideas what to do to resolve this?
> > 
> > --
> > 
> > Wayne Walker
> > 
> > wwalker at gnumber.com
> > 
> > Do you care who calls your cell phone at 3 in the morning?
> > www.gnumber.com
> > 
> > wwalker at bybent.com                 Do you use Linux?!
> > http://www.bybent.com              Get Counted!  http://counter.li.org/
> > Perl - http://www.perl.org/        Perl User Groups - http://www.pm.org/
> > Jabber:  wwalker at jabber.ntrc.net   AIM:     lwwalkerbybent
> > IRC:     wwalker on freenode.net
> > 
> > 
> >

-- 

Wayne Walker

wwalker at gnumber.com

Do you care who calls your cell phone at 3 in the morning?
www.gnumber.com

wwalker at bybent.com                 Do you use Linux?!
http://www.bybent.com              Get Counted!  http://counter.li.org/
Perl - http://www.perl.org/        Perl User Groups - http://www.pm.org/
Jabber:  wwalker at jabber.ntrc.net   AIM:     lwwalkerbybent
IRC:     wwalker on freenode.net