Re: Poor performance on Solaris

--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.

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.