Re: [Samba] ldbsearch performance and tuning...
- Date: Wed, 29 Aug 2018 10:01:46 +0100
- From: Rowland Penny via samba <samba@xxxxxxxxxxxxxxx>
- Subject: Re: [Samba] ldbsearch performance and tuning...
On Wed, 29 Aug 2018 10:39:20 +0200
Marco Gaiarin via samba <samba@xxxxxxxxxxxxxxx> wrote:
> Mandi! Andrew Bartlett via samba
> In chel di` si favelave...
> > > I'm still on samba4.5, sorry me.
> > Fix that first.
> Eh... i hope on this year.
>From that, it looks like you mean later this year, I would update as
soon as 4.9.0 comes out.
> > > 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.
> But accessing LDAP data via network (eg, from a DM to a DC), the use
> of '--paged' will gain some performance increase?
> > > 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.
> AFAI've understood, ldbsearch processes stalled sometimes when i'm
> doing 'primary' DC (ok, Rowland, the DC with FSMO roles ;-) backup
> with Louis script.
I think you mean the DC with the PDC emulator role ;-)
> I do the backup only on the DC with FSMO roles, and only the DM that
> 'hit' that DC seems have ldbsearch processes stalled.
When 4.9.0 comes out, you will be able to use the new samba-tool backup
command and equally importantly, the restore command.
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