nsd users - Apr 2015 - Initial request to server extremely slow after longer periods of inactivity

Hi!

I'm running this Rails app on a DigitalOcean FreeBSD droplet. Lately
I've been experiencing extremely slow initial requests after longer periods
of inactivity. Subsequent requests are fine.

At first I thought it was my PostgreSQL database or the Rails app itself, but
now I see SSH connections made simultaneously with those initial requests are
equally slow.

Could NSD be the culprit? Or my friend's NS2?

# cat nsd.conf

server:
  ip4-only: yes
  hide-version: yes
  logfile: "/var/log/nsd.log"

zone:
  name: "mydomain.com"
  zonefile: "/usr/local/etc/nsd/mydomain.com"
  notify: $FRIENDS_IP NOKEY
  provide-xfr: $FRIENDS_IP NOKEY

# cat mydomain.com

$ORIGIN mydomain.com.

$TTL 3m

@ IN SOA ns.mydomain.com. od.mydomain.com. (

2013070501 1h 15m 1w 3m )

@ NS ns.mydomain.com.
@ NS ns.friendsdomain.com.

@ MX 10 mail.mydomain.com.

@ A $MY_IP

ns IN A $MY_IP
mail IN A $MY_IP
somename IN A $MY_IP

www IN CNAME mydomain.com.

Thanks!

O.D.

Hi,

if you run the daemon in any environment that is resource starved and
the process(es) gets swapped than anything will be slow on first request
after period of inactivity. Not just NSD and not just any DNS server,
but anything...

Cheers,
Ondrej

On Thu, Apr 9, 2015, at 18:09, opendaddy at hushmail.com
wrote:
> Hi!
> 
> I'm running this Rails app on a DigitalOcean FreeBSD droplet. Lately
I've
> been experiencing extremely slow initial requests after longer periods of
> inactivity. Subsequent requests are fine.
> 
> At first I thought it was my PostgreSQL database or the Rails app itself,
> but now I see SSH connections made simultaneously with those initial
> requests are equally slow.
> 
> Could NSD be the culprit? Or my friend's NS2?
> 
> # cat nsd.conf
> 
> server:
>   ip4-only: yes
>   hide-version: yes
>   logfile: "/var/log/nsd.log"
> 
> zone:
>   name: "mydomain.com"
>   zonefile: "/usr/local/etc/nsd/mydomain.com"
>   notify: $FRIENDS_IP NOKEY
>   provide-xfr: $FRIENDS_IP NOKEY
> 
> # cat mydomain.com
> 
> $ORIGIN mydomain.com.
> 
> $TTL 3m
> 
> @ IN SOA ns.mydomain.com. od.mydomain.com. (
> 
> 2013070501 1h 15m 1w 3m )
> 
> @ NS ns.mydomain.com.
> @ NS ns.friendsdomain.com.
> 
> @ MX 10 mail.mydomain.com.
> 
> @ A $MY_IP
> 
> ns IN A $MY_IP
> mail IN A $MY_IP
> somename IN A $MY_IP
> 
> www IN CNAME mydomain.com.
> 
> Thanks!
> 
> O.D.
> 
> _______________________________________________
> nsd-users mailing list
> nsd-users at NLnetLabs.nl
> http://open.nlnetlabs.nl/mailman/listinfo/nsd-users

-- 
Ond?ej Sur? <ondrej at sury.org>
Knot DNS (https://www.knot-dns.cz/) ? a high-performance DNS server