[Samba] Samba 3.0.22 - slow performance - Really urgent help

[christoph.beyer at desy.de]

Hi,

I bet they are but I see thousands of them per second for every client 
that is 'just connected' and not doing anything, (on solaris) it slows 
down a t5120 machine with five connections to become unusable... I see the 
problem with:

samba-3.0.20
samba-3.2.14
samba-3.3.10
samba-3.4.1 
samba-3.4.5

stopped trying more versions than as there was no single response on this 
list and changed my service to a linux box where all of these versions run 
just fine :)

cheers
christoph


On Thu, 1 Apr 2010, Volker Lendecke wrote:

> On Thu, Apr 01, 2010 at 01:32:02PM +0200, Christoph Beyer wrote:
>> if you do 'truss -f -p <smbd-PID>' do you see a lot of:
>>
>> 19702:  fcntl(17, F_SETLKW64, 0xFFBFE640)               = 0
>>
>> ?
>>
>> If yes this is a problem that is present in most of the recent samba
>> versions (tried 5 or 6 versions off the different branches) it's a
>> solaris related bug but that's all I can say. It might be fixed in 3.5.1
>> ...
>
> Those many fcntl calls are just normal Samba operation. They
> should be *very* fast. There might be a problem with the
> messages.tdb, notify.tdb and notify_onelevel.tdb in current
> Samba version, where there is one fcntl read lock being held
> per smbd on each of these databases. This might be a
> performance problem if you have thousands of connected
> clients. But normally, fcntl calls should be very fast.
>
> Volker
>

best regards
 	~christoph


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