[Samba] Samba 3.3.4 very slow file access times

[Jeremy Allison]

On Wed, Oct 21, 2009 at 11:28:49AM -0700, John Goubeaux wrote:
> Can anyone shed any light ( or offer dome diagnosing tips) on why I am 
> seeing a considerable time delay in opening and writing back to excel 
> files on  a Samba 3.3.4 build  where as the same file on an earlier build 
> (2.2.8.a)  does not exhibit the same latency ???    - 11 seconds as 
> opposed to 3 seconds.    The problem does not seem to be as pronounced 
> with other file types though it is still slower.
>
> This problem has been plaguing me since I upgraded samba to a new host 
> and went production on it and  NOW I am receiving a barrage of  
> complaints from admin staff with the "why did you break it" ? underscore 
> !!
>
> At this point I have ruled out the obvious. Hosts running the builds are 
> on same network, storage is faster on the new build, same ver of excel, 
> same file (7mb) accessed from same machine. Newer build is running on 
> substantially faster hardware, and storage BUT  is authing against an 
> ldap backend as opposed to /etc/passwd

Changed version of the kernel ? You might want to get debug level
10 logs from the old and new versions and compare where things
start being different.

Jeremy