Date: Sat, 06 May 2006 22:32:01 +0200 From: Attila Nagy <bra@fsn.hu> To: Robert Watson <rwatson@FreeBSD.org> Cc: performance@FreeBSD.org, current@FreeBSD.org Subject: Re: Fine-grained locking for POSIX local sockets (UNIX domain sockets) Message-ID: <445D07C1.7080403@fsn.hu> In-Reply-To: <20060506150622.C17611@fledge.watson.org> References: <20060506150622.C17611@fledge.watson.org>
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Hello, On 2006. 05. 06. 16:16, Robert Watson wrote: > In local measurements, I have observed a 0% change in MySQL performance > on uniprocessor systems, and on a dual-processor system I have observed > a 4%-5% performance improvement with two client MySQL threads. Just a quick, nowhere correct test: http://people.fsn.hu/~bra/freebsd/20060506a-uds-fine-grain.diff/domsock.png The machine is a quad core Xeon LV server, the client side is sysbench, accessing mysql 4.1.8 on a socket. Heap table, simple test. -- Attila Nagy e-mail: Attila.Nagy@fsn.hu Free Software Network (FSN.HU) phone: +3630 306 6758 http://www.fsn.hu/
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