Re: Slapd running very slow

[Brian Reichert <reichert@numachi.com>]

On Tue, Apr 21, 2015 at 08:52:29PM +1000, Geoff Swan wrote:
> 
> I have an ldap server that appears to slow down significantly even under
> moderate load, and wondered if there were any suggestions as to where to
> look.
> 
> Using openldap-2.4.40 with mdb backend, on a dual Xeon (6 cores each)
> server with 128GB ram.
> Linux kernel 3.13, separate ext4 db volume (SAS). Slapd configured with
> 48 threads.
> 
> The problem appears that as soon as there are a handful of write
> operations, slapd appears to stall. Binding to the ldap port takes many
> seconds (instead of instant), and the slapd process appear to occupy
> 100% of a single CPU core.

What does your config file look like?

In particular, what does this setting look like for you:

  # Threads - four per CPU
  threads 8

-- 
Brian Reichert				<reichert@numachi.com>
BSD admin/developer at large