From owner-freebsd-hackers Tue Mar 20 10:53:45 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from earth.backplane.com (earth-nat-cw.backplane.com [208.161.114.67]) by hub.freebsd.org (Postfix) with ESMTP id 8409437B71A; Tue, 20 Mar 2001 10:53:41 -0800 (PST) (envelope-from dillon@earth.backplane.com) Received: (from dillon@localhost) by earth.backplane.com (8.11.2/8.9.3) id f2KIquW95665; Tue, 20 Mar 2001 10:52:56 -0800 (PST) (envelope-from dillon) Date: Tue, 20 Mar 2001 10:52:56 -0800 (PST) From: Matt Dillon Message-Id: <200103201852.f2KIquW95665@earth.backplane.com> To: Alfred Perlstein Cc: "Michael C . Wu" , "Michael C . Wu" , izero@ms26.hinet.net, cross@math.psu.edu, grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded scerver References: <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net> <20010320120112.C52586@peorth.iteration.net> <200103201815.f2KIFR594803@earth.backplane.com> <20010320122350.F52586@peorth.iteration.net> <20010320103130.Y29888@fw.wintelcom.net> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :If this is a result of the shared memory, then my sysctl should fix it. : :Be aware, that it doesn't fix it on the fly! You must drop and recreate :the shared memory segments. : :better to reboot actually and set the variable before any shm is :allocated. : :-- :-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] Lets see. Approximately 4MB shared across 4000 processes. That eats 1024 pte's per process, or around 4 million pmap elements that would be saved. That's a lot of KVM that would be saved. I'll bet turning that option on will magically solve most of Michael's problems too (though I'd still get rid of the MFS filesystem). -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message