[Samba] Slow FIND_FIRST2 response

[Volker Lendecke]

On Tue, Jul 30, 2013 at 12:56:18PM -0400, Ryan Bair wrote:
> I'm running Samba 4.0.7 on CentOS 6.4 running double duty as DC and file
> server.
> 
> OS X clients are taking a _long_ time to list long directories. One
> directory with 10K entries is taking 3-4 minutes to display the entries in
> Finder.
> 
> I captured a few seconds worth of packets and noticed that it's doing three
> requests per file:
> 1. NTCreateAndX - just opens the file
> 2. Close
> 3. FIND_FIRST2 - to look for the resource fork
> 
> The first two happen extremely fast, the 3rd one is the kicker. Samba is
> taking about 0.025 seconds to return a response to the client (usually no
> such file status). Multiple that by 10K requests and you have a few minutes
> on your hands.

Can you do an

strace -ttT -o smbd.strace -p <smbd-pid>

of the smbd serving the client while it's doing that? You
can find out the smbd pid with the smbstatus command. Please
upload the smbd.strace somewhere for inspection.

Thanks,

Volker Lendecke

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