Re: Poor performance on Solaris

[Dieter Kluenter <dieter@dkluenter.de>]

Am Thu, 24 Feb 2011 15:53:43 +0100
schrieb <Juergen.Sprenger@swisscom.com>:

> Hi,
> 
> we had some performance issues on our ldap servers running Solaris 10
> sparc.
> 
> I did some tests using slamd http://www.slamd.com/ and got disturbing
> results:
> 
> ldap-service: OpenLDAP 2.4.23, setup identical on both boxes,
> threads=64, identical content.
> 
> box1: 
> hardware: Sun Microsystems  sun4v SPARC Enterprise T5120
> memory:32 GB RAM
> os: Solaris 10 s10s_u9wos_14a
> searches (avg/second): 1521
> 
> box2:
> hardware: AMD 64 phenom 9850
> memory: 8 GB RAM
> os: Linux dsv00000 2.6.36.2 #1 SMP Mon Dec 27 10:09:29 CET 2010
> x86_64 AMD Phenom(tm) 9850 Quad-Core Processor AuthenticAMD GNU/Linux
> searches (avg/second): 22968
> 
> I am looking for some hints to improve performance on box1 to a
> similar level as on box2 or an explanation why on box1 performance is
> so bad.
> 
> As slapd.conf, ldap.conf and DB_CONFIG are identical there should not
> be such a big gap in performance.

It is hard to guess, as you didn't provide any build information,
but /dev/poll vs. libpthread and no. of IO's might be a hint.

-Dieter

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Dieter Klünter | Systemberatung
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