[Samba] high cpu usage samba 4 AD

Trenta sis trenta.sis at gmail.com
Tue Feb 13 22:59:25 UTC 2018

OK, Thanks for your information.
If I remove this new group with 3500 users, I understand that load
will be recovered to normal usage, correct?

About upgrade if I have only one server with 4.4.5 the best option is
add another dc with 4.7 compiled, then transfer and upgrade (or join
old server) or upgrade actual 4.4.5 to 4.7 and then add a new dc?
I like to keep 2 dc with same config and fully compatible and stable


2018-02-13 23:40 GMT+01:00 Andrew Bartlett <abartlet at samba.org>:
> On Tue, 2018-02-13 at 23:31 +0100, Trenta sis wrote:
>> Hi,
>> First of all thanks for your answer, today has increased cpu usage,
>> only change is add a new group with 3500 users, It could be the
>> problem?
> Yes, that will do it.  This is exactly the use case we have been
> working to make perform well since Samba 4.5, with Samba 4.7 having the
> best behaviour so far.
>> a last question, now we only have one dc, no replication.
>> If we add another dc will increase performance and will be a
>> loadbalance the load?
> Adding another 4.4 DC will cause catastrophic
> outages and is not recommended as the worst issues are in the
> replication engine.
> Just schedule an outage, upgrade to 4.7 by joining that to the domain,
> then transfer the roles and then add your second DC (which is otherwise
> always recommended).
>>  Now I can't upgrade to 4.7, I have to shcedule an upgrade and
>> make test, any suggestion or a workaround?
> I understand you feel unable to commit to the upgrade, but there is no
> workaround now you have the extra group memberships
> Andrew Bartlett
> --
> Andrew Bartlett
> https://samba.org/~abartlet/
> Authentication Developer, Samba Team         https://samba.org
> Samba Development and Support, Catalyst IT
> https://catalyst.net.nz/services/samba

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