samba - Jan 2006 - performance problem. big amount of net traffic for file properties

Hi,

We're having performance problems with some workstations (XP workstations).

The problem we diagnosed occurs when a user right clicks on a UNC link (on his 
desktop). The popup window only appears after 80 seconds. On another XP 
workstation (in the same room, same switch ...), it works OK.

We have dumped the network traffic from both these workstations, and the 
result is that from the buggy workstation, the amount of traffic is around 
30Mb,  with the same QUERY_FILE_INFO sent thousands of times (subcommand 
0x0007).

This problem is having a big impact on our performance. Is it a known issue ? 
(We can provide the dumps)

 Thanks a lot.



Jean-Philippe FARCY, Administrateur Syst?me 
SIGMA Informatique http://www.sigma.fr

Jean-Philippe FARCY wrote:
> Hi,
> 
> We're having performance problems with some workstations (XP
workstations).
> 
> The problem we diagnosed occurs when a user right clicks on a UNC link (on
his
> desktop). The popup window only appears after 80 seconds. On another XP 
> workstation (in the same room, same switch ...), it works OK.
I have noticed the same on my XP comps, but not all. Currently I'm 
investigating the problem (maybe some NICs are not samba-friendly ;-)? 
The problematic machine uses Asus mainborad A8Vdeluxe (with marvel yukon 
ethernet card)

Samba 3.0.14a/Debian stable.

Regards
Piotr L.

Hi, 

I'm working with Jean-Philippe, and the problem doesn't seem to be a
buggy net
driver, as all the packets received by the server seem valid (no checksum 
error). But of course, we're no windows experts, so maybe in windows the 
low-level drivers can have an influence with the upper IP stack...

Most (if not all) of the traffic from the XP workstation seems OK, except for 
this crazy retransmission of the same request (not a tcp retransmission, the 
paquets have different tcp sequence numbers).





Le Vendredi 27 Janvier 2006 12:06, FARCY Jean-Philippe a
?crit?:
> Hi,
>
> We're having performance problems with some workstations (XP
workstations).
>
> The problem we diagnosed occurs when a user right clicks on a UNC link (on
> his desktop). The popup window only appears after 80 seconds. On another XP
> workstation (in the same room, same switch ...), it works OK.
>
> We have dumped the network traffic from both these workstations, and the
> result is that from the buggy workstation, the amount of traffic is around
> 30Mb,  with the same QUERY_FILE_INFO sent thousands of times (subcommand
> 0x0007).
>
> This problem is having a big impact on our performance. Is it a known issue
> ? (We can provide the dumps)
>
>  Thanks a lot.
>
>
>
> Jean-Philippe FARCY, Administrateur Syst?me
> SIGMA Informatique http://www.sigma.fr

Marc Cousin wrote:
> Most (if not all) of the traffic from the XP workstation 
> seems OK, except for  this crazy retransmission of the same request (
> not a tcp retransmission, the paquets have different tcp
> sequence numbers).
Spooler traffic for GetPrinterData()  perhaps?  This is a known
bug in the XP client spooler.






cheers, jerry
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