Date: Mon, 19 Sep 2005 15:17:57 +1000 From: "David J. Hughes" <bambi@Hughes.com.au> To: Uwe Doering <gemini@geminix.org> Cc: Brandon Fosdick <bfoz@bfoz.net>, freebsd-stable@freebsd.org Subject: Re: Jail to jail network performance? Message-ID: <e38a4f1b6d433ba30f6d8773b94a9e58@Hughes.com.au> In-Reply-To: <4327CA3C.6050403@geminix.org> References: <432753CF.6020001@bfoz.net> <4327CA3C.6050403@geminix.org>
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On 14/09/2005, at 4:59 PM, Uwe Doering wrote: > So in case of MySQL you would have to use TCP sockets to communicate > between jails. This socket type typically consumes more CPU because > of TCP's protocol overhead. However, whether you would actually > notice any difference in speed basically depends on how much excess > CPU power there is available on that server. The result of running these sort of connections over TCP rather than a UNIX domain connection are far more dramatic than this would indicate. When I wrote mSQL and added UNIX domain sockets as a connection option I was able to produce a 10 fold increase in query processing rates for basic queries. If there's a high and constant rate of queries then doing it over a TCP connection is not going to win you any friends. David ...
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