[Pdns-users] Fwd: PDNS Timing Out

Wed Jul 28 15:27:35 UTC 2010

Sorry all.

I didnt notice that I replied for Brandon only, so I forwarded the answer
here (and trimmed the config file comments)

Brandon, /etc/init.d/pdns dump show some data.

You should have 2 things: monitoring and more redundancy.

At first, I suggest you to turn the webserver on. The 1st line will be
something like that:

Uptime: 1.09 days Queries/second, 1, 5, 10 minute averages: 425, 420, 420.
Max queries/second: 454

With that you know how many queries reach your server. Cache hits is other
useful information.

If your load increase, you should use more servers to handle it. You really
want a cluster to answer for your NS1.

---------- Forwarded message ----------
From: Brandon Lee <devmgr1 at yahoo.com>
Date: 2010/7/28
Subject: Re: [Pdns-users] PDNS Timing Out
To: José Arthur Benetasso Villanova <jose.arthur at gmail.com>

Hello Jose,

Thank you for your time.   I have posted the information below:

Which O.S. and hardware are you using?  Linux x64bit, Quad Core, 4GB memory
How many queries / second ? Is there a command to get this information?
How many machines answering for your Master? 1
Can you post your configuration file? See below.

allow-axfr-ips=1.1.1.4
allow-recursion=127.0.0.0/8,.....
chroot=./
config-dir=/etc/powerdns
daemon=no
disable-axfr=no
distributor-threads=3
do-ipv6-additional-processing=no
guardian=yes
launch=gmysql
gmysql-host=1.1.1.1
gmysql-user=pdns
gmysql-dbname=pdns
gmysql-password=pdns
local-address=1.1.1.1
log-dns-details=no
log-failed-updates=yes
loglevel=7
master=yes
recursor=1.1.1.2
setgid=pdns
setuid=pdns
webserver=no
webserver-password=admin

 ------------------------------
*From:* José Arthur Benetasso Villanova <jose.arthur at gmail.com>
*To:* Brandon Lee <devmgr1 at yahoo.com>
*Sent:* Tue, July 27, 2010 5:58:55 PM
*Subject:* Re: [Pdns-users] PDNS Timing Out

Hi Brandon.

To answer your question, we need to know a bit more of your environment.

Which O.S. and hardware are you using?
How many queries / second ?
How many machines answering for your Master?
Can you post your configuration file?

Did you turn on the webserver? Looking at the webserver page, you can find
some useful info to help you.

Jose Arthur.

On Tue, Jul 27, 2010 at 8:49 PM, Brandon Lee <devmgr1 at yahoo.com> wrote:

>  Hello,
>
> Recently, our master PowerDNS server load increased dramatically and is
> timing out in certain areas of the world when servers are performing look
> ups.  For example, an email user reported that they were getting NDRs and
> delayed reports.  After we investigated we come to find that the sending
> user's mail server was timing out when performing lookups.
>
> Therefore, we turned on logging by setting the log level to 6 in the
> pdns.conf file and only on the master server we saw hundreds of queries like
> below being logged whereas on the slave server this was not happening.  Not
> sure if this is related, but the master DNS server is in high load.
>
> One thing we have done was changed all our domains SOA record TTL from 3600
> to 86400 to see if that would bring the load down and no cigar.  Also, is it
> recommended to run PowerDNS in daemon mode?
>
> Any help is greatly appreciated.
>
> n_id=215
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
> me from records where name='ns1.mydomain.com'
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
> me from records where name='ns2.mydomain.com'
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
> me from records where name='ns1.mydomain.com'
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
> me from records where name='ns2.mydomain.com'
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
> me from records where name='mydomain.com'
> May  9 03:35:45 ns1 pdns[9065]: Query: select
> content,ttl,prio,type,domain_id,na
>
>
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>
>

-- 
José Arthur Benetasso Villanova

-- 
José Arthur Benetasso Villanova
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