[Samba] ldbsearch performance and tuning...

Andrew Bartlett abartlet at samba.org
Tue Aug 28 19:33:41 UTC 2018

On Tue, 2018-08-28 at 18:28 +0200, Marco Gaiarin via samba wrote:
> I'm still on samba4.5, sorry me.

Fix that first.

> I've done some (bash) scripting around ldbsearch, but i've found some
> performance and 'lock' trouble.

Correct, Samba before 4.7 has very poor unindexed search performance,
due to a bug. 

> a) query seems 'slow'. If i user paged result (--paged) coud achive
>  better performance? It is a 'network' optimization only, right? eg:
> 	ldbsearch --paged -H /var/lib/samba/private/sam.ldb ...
>  is totally unuseful, right?

Correct, this would just increase the load.

> b) in a domain member (so, network queries) i've found some
> 'ldbsearch'
>  processes stalled. I was forced to kill them.
> There's some way to prevent that? Eg, via '--socket-options=' or
> '--controls=' options?

I would need more information on that.  Fixing the server to run a
current Samba would likely fix that.

Andrew Bartlett
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba

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