[Samba] Performance issues after samba update (utime?)

Alex Still alex.ranskis at gmail.com
Tue Feb 26 22:57:46 GMT 2008

Hi all,

We're experiencing performance issues after migrating from 3.0.8 to 3.0.28.
Write performance has degraded about 30%, regardless of the size of file
being copied. (tests described below are a single 150Mb file copy from an XP

The setup is somewhat peculiar as the server is mounting NFS shares (v3) and
exporting these.
smb.conf hasn't changed, save for the addition of "msdfs root = no"

Comparing smbd truss output between these version shows a likely culprit :
3.0.28 is doing lots of utime() calls, and these take a long time on an NFS

Someone seems to have encountered this issue before :

But I see no followups to this.
Any way to fall back to the old behavior, with less utime calls ?
Failing that I'd be happy to get any recommandations you guys might have in
order to mitigate the issue (or tell me that this is a red herring and I
should look elsewhere :-) )

A few details on the environment : solaris 10, nfs v3 with mount options set
to hard,tcp,rsize=4096,wsize=4096



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