[Samba] Slow and unpredictable Samba performance?

[Jeremy Allison]

On Tue, Aug 26, 2008 at 06:32:01PM +0200, Jakov Sosic wrote:
> On Tuesday 26 August 2008 18:23:18 Andrew Morgan wrote:
> 
> > Why not open a support ticket with Sun then, since it is their packaging
> > of Samba that seems to be slow?  :)
> 
> Because I use Solaris without support, and I tought this could be a version 
> issue perhaps (3.0.23 vs 3.0.28)?
> 
> Also, I don't quite understand why is transfer performance dependant on log 
> level settings. I mean, at 100Mbps, if log level is higher than 3 then 
> performance drops significantly - like from theoretical 11MB/s to around 
> 3MB/s.

Upping the log level will kill performance. smbd does a flush
after every line of a log write.

Jeremy.