Quanah Gibson-Mount wrote:
--On Thursday, February 24, 2011 3:53 PM +0100
Juergen.Sprenger(a)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.
Actually, you should always use a shared memory key on Solaris. Using mmap'd
files is just too slow on that OS.
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.
--
-- Howard Chu
CTO, Symas Corp.
http://www.symas.com
Director, Highland Sun
http://highlandsun.com/hyc/
Chief Architect, OpenLDAP
http://www.openldap.org/project/