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

[Peter Eriksson]

Ah, yes, should have remembered that (not the first time :-). The graphs can be found at:

   http://www.grebo.net/~peter/samba/ <http://www.grebo.net/~peter/samba/>

- Peter

> On 4 Sep 2018, at 15:35, Rowland Penny via samba <samba at lists.samba.org> wrote:
> 
> On Tue, 4 Sep 2018 15:13:10 +0200
> Peter Eriksson via samba <samba at lists.samba.org <mailto: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
> 
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