Date: Mon, 1 Jul 2002 19:38:26 -0400 From: Garance A Drosihn <drosih@rpi.edu> To: "Louis A. Mamakos" <louie@TransSys.COM> Cc: freebsd-hackers@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: ftp and mail much slower into fbsd 4.4 vs and old BSDi Message-ID: <p05111715b9469008f326@[128.113.24.47]> In-Reply-To: <200207012205.g61M5t0L008698@whizzo.transsys.com> References: <55379.1025557087@critter.freebsd.dk> <200207012205.g61M5t0L008698@whizzo.transsys.com>
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At 6:05 PM -0400 7/1/02, Louis A. Mamakos wrote: > >Why so many applications go to the trouble to disable Nagle's >algorithm is beyond me. I suspect the socket option has too >seductive of a name. I suspect someone had a specific case where Nagle's algorithm causes a real problem. They turn on TCP_NODELAY for that situation, see a huge improvement, and assume that it is a good idea to always turn on TCP_NODELAY. We had one case here were reloading a MOO database through a network connection took something like 5 hours. Turning on TCP_NODELAY reduced the time to about 10 minutes. We got all excited about that, and tried TCP_NODELAY in a number of other situations in the same MOO. In all other cases the option either hurt performance or did not help it enough to care about... -- Garance Alistair Drosehn = gad@gilead.netel.rpi.edu Senior Systems Programmer or gad@freebsd.org Rensselaer Polytechnic Institute or drosih@rpi.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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