low sysbench scores on 8 core server

[Lutz Rabing]

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