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Re: Poor performance on Solaris
--On Thursday, February 24, 2011 3:53 PM +0100
we had some performance issues on our ldap servers running Solaris 10
I did some tests using slamd http://www.slamd.com/ and got disturbing
ldap-service: OpenLDAP 2.4.23, setup identical on both boxes, threads=64,
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
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.
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