Hi, I totally agree with you about Solaris + OpenLdap issues. Just use Linux if you will use openldap if possible of course ..

Regards.

On Thu, Feb 24, 2011 at 8:28 PM, Quanah Gibson-Mount quanah@zimbra.com wrote:

--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

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

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