Severe problem with Samba

Martin Rootes M.J.Rootes at shu.ac.uk
Tue Dec 18 07:04:14 GMT 2001


Thanks Jeremy, I'll compile it up and test it out.

	Martin.

Date sent:      	Thu, 13 Dec 2001 15:17:32 -0800
To:             	Martin Rootes <M.J.Rootes at shu.ac.uk>
Copies to:      	Samba <Samba at lists.samba.org>
Subject:        	Re: Severe problem with Samba
From:           	jra at samba.org (Jeremy Allison)

> On Thu, Dec 13, 2001 at 06:08:03PM +0000, Martin Rootes wrote:
> > Dear All,
> > 
> > 	we are experiencing severe problems with Samba 2.2.0 (with quota support) running on a 
> > dual processor (400MHz) Sun E450 running Solaris 2.7. This is used as a central file server for 
> > student diskspace, accessed by approx 1200 PCs running NT 4. Up until recently we 
> > experienced some, what we assume to be, loading issues with connections during the middle of 
> > the day being slow. However, recently we have been encountering severe problems. Everything 
> > seems fine until  midday, then what we start to see is the number of smbd processes going up 
> > whilst the number of connections (determined from smbstatus -b) dropping, students with 
> > connections starting getting slow responses and no new connections are being made, load on 
> > the system skyrockets. stopping samba and restarting seems to cure the problem, but the 
> > problem can re-occur. We are in a desperate panic at the moment as the students are all doing 
> > assignments and this is seriously affecting their work. We have tried various tweaks to Samba 
> > (deadtime, change notify timeout), the tcp stack and have tripled system memory, all to no avail. 
> > We also seem to have an issue with keepalives and tcp_nodelay, neither of which seem to work 
> > at all, we see the following messages in the log about keepalives:-
> 
> We think we've solved these in the latest Samba 2.2.x CVS tree. Unfortunately
> this isn't released as "stable" 2.2.3 code yet (getting close though). If you'd
> like to test this the CVS branch is SAMBA_2_2. It has been confirmed to fix this
> problem on other Solaris and HPUX boxes.
> 
> Jeremy.


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Martin Rootes - Senior Systems Programmer/Analyst, Sheffield Hallam University
Email :         M.J.Rootes at shu.ac.uk                      Phone: 0114 225 3828
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