[Samba] winbindd performance tunning?

Volker Lendecke Volker.Lendecke at SerNet.DE
Thu Mar 14 01:20:46 MDT 2013

On Thu, Mar 14, 2013 at 01:25:06AM +0800, xx77009833 wrote:
> Winbindd version is 3.5.8, it runs on a 8 core CPUs
> machine, and my DC(win2k8) runs on a 4 core CPUs machine.
> "performance is slow" means, the transaction per second is
> around 200. I think it is slow and should be better.

200 ntlm auth requests per second is not too bad in 3.5.8 I
guess. 3.6.12 has a "winbind max domain connections" which
allows you to open more than one connection to the DC. You
should try that.

> The CPU usage of winbindd is not high. I suspect that
> winbindd doesn't processing the request in parallel or it
> is blocked by some internal synchronous operation. But I
> am not sure.
> Till now, I have not profiled winbindd to find where the time is spent......

My guess would be that it's the DC. Can you wireshark the
network to the DC and analyze the response time there?


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