[Samba] authentication performance with 4.7.6 -> 4.7.8 upgrade (was: Re: gencache.tdb size and cache flush)

[Rowland Penny]

On Tue, 4 Sep 2018 15:13:10 +0200
Peter Eriksson via samba <samba at lists.samba.org> wrote:

> I’m going to try to upgrade from 4.7.6 to 4.7.7 on one of our servers
> soon and see if things break or not. With 4.7.6 things are stable at
> least.
> 
> Our file servers are in a Microsoft Windows domain (consisting of 6
> Microsoft Windows 2016 AD servers).
> 
> 
> The graphs (logarithmic time scale) below are login times from a
> probe station that times a connect using “smbclient” with a Kerberos
> ticket and basically just quits directly. It shows five of our Samba
> servers in one graph (so not so easy to read :-)
> 
> Samba 4.7.6 (2018-09-04, right now, around 400-500 users per server):
> 
> 
> 
> Samba 4.7.8 (2018-08-29):
> 
> 
> 
> The probe software has a 10 seconds timeout so the “spikes” are
> probably/basically connection attempts that timed out. We probe all
> servers every minute. The holes in the graphs are 10 hours apart from
> last reboot (07:00 every day) -17:00, 03:00) and then nobody could
> connect basically (or the attempts took more than a minute so the
> whole session was aborted - and thus no data recorded in the RRD
> databases).
> 
> - Peter

Sorry, but this list strips attachments, can you post them somewhere
and then post links.

Rowland