[Pdns-users] Possible tcp listener issue

Simon Bedford sbedford at plus.net
Mon Jul 26 13:24:03 UTC 2010

Simon Bedford wrote:
> Hi Bert,
> Is there any update on this bug, interested to know if you have found 
> the root cause of it...
> Also I have just upgraded one of our internal servers from Debian Etch 
> and pdns-recursor-3.1.7-2 to Debian Lenny and the same patched version 
> of pdns-recursor-3.2 that we use on the live customer DNS and the 
> response time graphing for bbc.co.uk has gone up by at least double.  Is 
> this something you have seen before at all, I am investigating from this 
> end as well but the upgrade definitely caused this, I can send you the 
> graphing seperately if required.

Bit more info on this for you, just done 3 more servers and going from 
Etch to Lenny and keeping pdns-recursor 3.1.7-2 was fine and response 
times were the same as before the OS upgrade.

I then just upgraded the version to our patched version of 3.2 but 
without specifying our usual 4 threads and the response times went up on 
the graphing straight away, upping the number of threads makes no 
difference and the response times stay high...

I will let the graph update some more and save it should you need it for 
more information.

> Its worth pointing out that even though they have double its still a 
> good response time just not as awesome as the initial versions...
> Thanks
> Simon
> bert hubert wrote:
>> The issue has now been reproduced on one of the PowerDNS servers, thanks to
>> Brad and Christian. However, it is quite some work to make it happen and
>> we've not yet been able to make sense of *why* it is happening.
>> We'll keep you posted.
>> Once this is solved, 3.3 will be released.
>> 	Bert
>> On Tue, Jul 06, 2010 at 04:11:35PM +0100, Simon Bedford wrote:
>>> Hi Christian,
>>> Have we had any joy in replicating this issue or highlighting the
>>> root cause of the issue?
>>> Thanks
>>> Simon
>>> Christian Hofstädtler wrote:
>>>> Brad, Josh,
>>>> I'm trying to reproduce the behaviour you see here, but fail to do so at this time.
>>>> Maybe you can give me more details about your environment, at least OS version, architecture, and any compile options you've used to build the binary (say, STATIC or LUA).
>>>> Also of interest would be the last SVN revision you've tried out.
>>>> If there is anything else you can think of which is special in your environment, please let me know of that, too.
>>>> Thanks,
>>>> Christian
>>>> _______________________________________________
>>>> Pdns-users mailing list
>>>> Pdns-users at mailman.powerdns.com
>>>> http://mailman.powerdns.com/mailman/listinfo/pdns-users
>>> _______________________________________________
>>> Pdns-users mailing list
>>> Pdns-users at mailman.powerdns.com
>>> http://mailman.powerdns.com/mailman/listinfo/pdns-users

More information about the Pdns-users mailing list