Re: Slapd running very slow

[Howard Chu <hyc@symas.com>]

Brian Reichert wrote:
> On Tue, Apr 21, 2015 at 08:23:31AM -0700, Quanah Gibson-Mount wrote:
> > --On Tuesday, April 21, 2015 11:54 AM -0400 Brian Reichert
> > <reichert@numachi.com> wrote:
> > > What does your config file look like?
> > >
> > > In particular, what does this setting look like for you:
> > >
> > >   # Threads - four per CPU
> > >   threads 8
> >
> > According to his summary, he's using 48 threads.
>
> Thanks for pointing that out; I should finish my coffee before
> posting. :)
>
> > 4 per CPU/core was a good
> > rule of thumb with bdb/hdb.  So far in playing with back-mdb, it's seemed
> > closer to 2 per CPU/core for me in benchmarking.
>
> Useful to note.  Has this detail ended up in any docs yet?

No, nor should it. Performance depends on system environment and 
workload - the right value is one that each site must discover for 
themselves in their own deployment.

--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/