[Samba] Slow reply to "smbclient -NL localhost" : strace

[Rowland Penny]

On Tue, 5 Nov 2024 10:36:49 +0100
Gilles via samba <samba at lists.samba.org> wrote:

> On 04/11/2024 15:11, Rowland Penny via samba wrote:
> > As I said previously, I do not think this has anything to do with
> > Samba. In an earlier post, you had this output when you ran the same
> > command using 'time':
> >
> > real    0m12.500s
> > user    0m0.732s
> > sys     0m0.102s
> >
> > The 'real' time is the total time it took to run the command, but
> > 'user' + 'sys' is the actual time it took for the Samba part of it,
> > in this case 0.834 seconds, the remaining 11.666 seconds is where
> > your problem lies, what is causing this ?
> > That is what you need to trace, what is getting in the way, it
> > doesn't seem to be anything to do with Samba.
> >
> > When it comes down to it, your 'strace' appears to be useless in
> > this context, there is no 'time' involved.
> 
> Thanks. So I'll look elsewhere to understand why that command is
> taking so long.

I took a look at your strace again and I noticed that the hostname was
'sheevaplug', now I can only really think of one reason why such a
hostname would be used, if it was an actual Sheevaplug.

If this is a Sheevaplug, then that could be your problem.
From memory, the Sheevaplug had a single core ARM CPU, running at just
over 1GHZ with about 512MB of memory. To be honest I haven't heard of
one of these for years, they were supplanted by the Raspberry pi, a
much more capable computer, that has only got better and better.
 
> 
> FWIW, there's no delay after I run it once… but only for a couple of 
> minutes.

It is probably getting cached in memory and then overwritten.

Rowland