[URGENT] Samba 4.0.9 smbd slow.

[Jeremy Allison]

On Wed, Sep 25, 2013 at 07:31:13AM -0700, Richard Sharpe wrote:
> On Wed, Sep 25, 2013 at 4:45 AM, Juan Pablo Lorier <jplorier at gmail.com> wrote:
> > Hi Richard,
> >
> > I'll take a look at the resources at the time the problem starts, but I
> > can tell you that either CPU or RAM are not being fully used.
> > CPU is over 90% idle all the time and ram is less than 4GB out of 12GB
> > for the hole system and I don't remember seen a notifying increase in
> > any of the smbd instances.
> > By slow down is that a user that is already logged to a share, just to
> > change folder may take over a minute, yesterday, rendering a file took
> > over 8 minutes to start and then it worked as usually. All this
> > "latency" disappears when I restart smbd.
> > I didn't compile from git as I'm trying to get "stable" releases for
> > this matter though I know it's not really stable.
> > Regards,
> 
> Hmmm, what clients? As in, SMB1 or SMB2?
> 
> I have seen cases where SMB1 clients get into a crazy mode where they
> are sending thousands of requests for what looks like the same info.
> It comes and goes, it seems, and I have never figured out what
> provokes this.
> 
> We saw it happen with Autocad ...

Wireshark captures are also extremely useful when it's
going this slowly.

Jeremy.