[Samba] samba 4.7.3 DLZ performance regression

[Garming Sam]

Hi,

We've just had another person notice this issue and we're currently
looking into it. If we need someone to test the patch fix, or if we need
more information, we can let you know.

I've filed a bug as well:

https://bugzilla.samba.org/show_bug.cgi?id=13191


Cheers,

Garming


On 14/12/17 09:40, Arthur Ramsey via samba wrote:
> Hello,
>
> I'm seeing a huge performance regression with Samba 4.7.3 DLZ and BIND
> 9.8.2rc1-RedHat-9.8.2-0.62.rc1.el6_9.4.  If I remove DLZ external DNS
> requests are a few ms.  If it is enabled then internal and external
> DNS requests are a 1-3 seconds or timeout.  Downgrading BIND had no
> effect.
>
> I reverted just the DLZ modules back to 4.7.0 and performance is back
> to normal:
>
> # cp /usr/src/samba-4.7.0/bin/modules/bind9/dlz_bind9*
> /usr/local/samba/lib/bind9
> # echo 'export LDB_MODULES_PATH=/usr/src/samba-4.7.0/bin/modules/ldb'
> >> /etc/sysconfig/named
> # service named restart
>
> Thanks,
> Arthur
>
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