Re: Poor performance on Solaris

 
--On Thursday, February 24, 2011 3:53 PM +0100 
Juergen.Sprenger@swisscom.com wrote: 

> 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 

Slowaris is always tedious with OpenLDAP.  At a previous job, I was able to 
replace 9 slowaris boxes with 4 linux boxes, and even then, just one of the 
Linux boxes could handle the complete load it took the 9 slowaris boxes to 
run. 

I will note that if you are going to use slowaris, I highly advise you set 
a memory key rather than using on disk cache for BDB if your DB is any size 
over about 4 GB.  Other than that, you'll generally just have to deal with 
the fact it will be significantly slower than Linux. 

Some time ago, I did benchmarks of Linux 2.6 vs Slowaris-x86 on identical 
hardware, and it still was noticeably slower, although not as bad as when 
using the sparc architecture. 

--Quanah 


-- 

Quanah Gibson-Mount 
Sr. Member of Technical Staff 
Zimbra, Inc 
A Division of VMware, Inc. 
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