Hi.
Robert Watson wrote:
Also I faced the same problem moving heavily loaded MySQL-server to
new hardware. That time I thought that the problem is in the
mysql-server itself and I had to install Linux.
What can I do to make FreeBSD run faster on many-CPU systems???
Have you configured libmap.conf to force MySQL to use libthr instead of
libpthread? libpthread is known to have serious performance bottlenecks
for MySQL as compared to libthr.
I'm always using libthr with MySQL on 6-STABLE and it really helps. But
that time with MySQL (and this time with Apache) the bottleneck was
somewhere else.
FreeBSD 7 contains significant optimization for increased numbers of
cores, and is where a lot of the work optimizing MySQL has ended up. I
see you're trying out a 6.3 beta, any chance you could try out a 7.0
beta instead? Also, consider switching to "options SCHED_ULE" in the 7.0
kernel rather than "options SCHED_4BSD".
I tried 7-BETA with SHED_4BSD and id did not help. Now I'll try
SHED_ULE, thanks.
With best regards,
Alexey Popov
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