[Samba] samba 4.7.3 DLZ performance regression

Garming Sam garming at catalyst.net.nz
Thu Dec 14 21:16:48 UTC 2017


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:




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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