Date: Mon, 07 Jul 2008 10:44:52 +0200 From: Lutz Rabing <rabing@omc.net> To: Kris Kennaway <kris@FreeBSD.org> Cc: freebsd-performance@FreeBSD.org Subject: Re: low sysbench scores on 8 core server Message-ID: <4871D784.1020809@omc.net> In-Reply-To: <486E6B00.10208@FreeBSD.org> References: <486E4C20.7050102@omc.net> <486E6B00.10208@FreeBSD.org>
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Kris Kennaway schrieb: > Lutz Rabing wrote: >> hi, >> >> I did some testing an a supermicro 2 x 4 core xeon server under 64bit >> "7.0-STABLE #1: Fri Jul 4". when we first tested the system under load >> (2000 apache threads) the system performed bad compare to other dual >> core systems under the same workload. >> >> the 8 core system had 0% idle time and almost 100% system load. I could >> not find out what the load was. disk IO was close to zero during that >> time. >> >> because of that I checked the sysbench results with this test: >> >> sysbench --test=oltp --mysql-socket=/tmp/mysql.sock --mysql-user=root \ >> --max-requests=0 --max-time=60 --oltp-read -only=on --num-threads=$1 run > > See my tuning notes at: > > http://people.freebsd.org/~kris/scaling/mysql.html > >> software versions used: >> - mysql-server-5.1.25 > > In my tests mysql 5.1 has much worse performance than 5.0. > > Kris > > > . > hi kris, thanks for your response. going back to mysql-5.0.51a the 8core server performed as expected. (sysbench oltp: 4335 with 8 threads) thanks, lutz
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