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Date:      Thu, 03 Jan 2008 22:52:39 +0100
From:      Kris Kennaway <kris@FreeBSD.org>
To:        Gergely CZUCZY <phoemix@harmless.hu>
Cc:        Jeff Roberson <jroberson@chesapeake.net>, freebsd-performance@freebsd.org
Subject:   Re: mysql scaling questions
Message-ID:  <477D5927.4030100@FreeBSD.org>
In-Reply-To: <20071230132451.GA61295@harmless.hu>
References:  <20071129101729.GA57985@harmless.hu> <20071130143023.I884@192.168.1.107> <20071201163334.GA21709@harmless.hu> <200712012055.lB1Kt5IQ005728@lava.sentex.ca> <20071201205609.GA54238@harmless.hu> <200712012108.lB1L8qAd005766@lava.sentex.ca> <20071201211012.GA55519@harmless.hu> <20071201122122.S884@192.168.1.107> <20071204130810.GA77186@harmless.hu> <47779AA7.2060801@FreeBSD.org> <20071230132451.GA61295@harmless.hu>

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Gergely CZUCZY wrote:

>> * Compare to my config file here:
>>
>> http://people.freebsd.org/~kris/scaling/my.cnf
>>
>> The default mysql config has very poor performance for innodb (you need at least innodb_thread_concurrency = 0 to disable some mysql 
>> brain-death).  Maybe tuning is required for myisam also.
>>
>> * Also make sure you are using identical config settings on the two systems.
> http://phoemix.harmless.hu/mysql/ verify yourself. Only the paths are
> updated, but the main parameters are just the same.

You are not in fact using the same config parameters as I am.  When I 
use your config file I see a large performance loss when I run locally 
even with innodb.

Kris




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