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Date: Mon, 16 Feb 2009 16:56:02 +0000
From: Jonathan Belson <jon@witchspace.com>
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Subject: Performance problem with samba/zfs
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Hiya

I export a few samba shares from a FreeBSD amd64 server and I've been editing 
text files on one of the shares via a Windows box.

This /usually/ works fine, but occasionally I'll get a pause of several seconds 
when I save back a modified file.  No errors are generated on the server, but it 
causes the smbd process takes a few % of available cpu time, according to top.

Could this be due to the infamous seekdir/seekdir issue between samba and 
FreeBSD?  Some of the directories do contain hundreds of files.  This post 
suggests it has been fixed though: http://www.vnode.ch/fixing_seekdir

The server is running -STABLE ('FREEBSD 7.1-PRERELEASE'), as built on 
2008/09/08.  The file system is zfs.  I'm using samba 3.0.34,1, built from ports.

Any ideas, anyone?

Cheers,

--Jon