On Wednesday 05 April 2006 08:31, David Xu wrote: > > Can you disable log-bin option in my.cnf to see if it is a FS bottleneck > when you are running update-smack ? please run Linux and FreeBSD > with same hardware and my.cnf configuration, thanks. > I know this is not very right, but it can be used to narrow down some > kernel performance problem.
I can't test disabling log-bin option right now since those 8 core systems were shipped out to client today, but I will probably get access to some identical servers next week, so I will then test this and whatever other suggestions you people can come up with. Until then can we maybe consentrate on * why does 8 core machine get so awful select score without renicing mysqld * why is select result on linux >65000 q/s while fbsd can do only about 21000 q/s But the bencmark results that I stated for 8 core machines were done on 4 _identical_ servers, with following operating system installations: server 1 - suse enterprise linux 9 with kernel 2.6.5-7.97-smp, mysql 4.0.18-32.1, reiserfs server 2 - Fedora core with kernel 2.6.9-22-ELsmp, mysql 4.1.12, ext3 server 3 & server 4 - freebsd 6.1 beta 4,generic-smp kernel, mysql 4.1.12_2 from ports, ufs2 + softupdates, libthr While it was not the very _same_ hardware, the machines were absolutelly identical in every aspect and fbsd results on 2 servers were identical within the limits of measurement error so it's rather unlikely that some hardware glitch can be blamed for the differences. The mysql configuration file was also identical - default my-huge.cnf with max_connections change @ http://bsd.ee/~hadara/debug/mysql3/2way/my.cnf Hardware spec of those servers was: motherboard: Thunder K8QSD Pro hdd: scsi seagate cheetah 10K7 ram: 8 * 3200 CL3 kingston ECC 1G cpu: 4 * opteron 870 (2Ghz dualcore) Results for other UP and dual machines that I mentioned were given just to give some general feeling about scalability. So just to state the 8 core results in a more concise manner: smack suse fedora fbsd 6.1b4 ----------------------------------------------------- select 76857 67000 21000 update 10047 8072 4100 _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"