From owner-freebsd-hackers@FreeBSD.ORG Wed Nov 7 18:12:35 2007 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5205C16A46D for ; Wed, 7 Nov 2007 18:12:35 +0000 (UTC) (envelope-from tom.hurst@clara.net) Received: from spork.qfe3.net (spork.qfe3.net [212.13.207.101]) by mx1.freebsd.org (Postfix) with ESMTP id 17B1F13C4BA for ; Wed, 7 Nov 2007 18:12:34 +0000 (UTC) (envelope-from tom.hurst@clara.net) Received: from [81.104.144.87] (helo=voi.aagh.net) by spork.qfe3.net with esmtp (Exim 4.66 (FreeBSD)) (envelope-from ) id 1Ipp8o-000JLV-9y; Wed, 07 Nov 2007 17:56:38 +0000 Received: from freaky by voi.aagh.net with local (Exim 4.68 (FreeBSD)) (envelope-from ) id 1Ipp8n-00055y-VZ; Wed, 07 Nov 2007 17:56:37 +0000 Date: Wed, 7 Nov 2007 17:56:37 +0000 From: Thomas Hurst To: perryh@pluto.rain.com Message-ID: <20071107175637.GA15088@voi.aagh.net> Mail-Followup-To: perryh@pluto.rain.com, binto@triplegate.net.id, freebsd-hackers@freebsd.org References: <4635.202.127.98.144.1194407276.squirrel@webmail.triplegate.net.id> <47314262.mjHsuOhoRAZyEdhO%perryh@pluto.rain.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47314262.mjHsuOhoRAZyEdhO%perryh@pluto.rain.com> Organization: Not much. User-Agent: Mutt/1.5.16 (2007-06-09) Sender: Thomas Hurst Cc: binto@triplegate.net.id, freebsd-hackers@freebsd.org Subject: Re: page fault & degaradation performance X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Nov 2007 18:12:35 -0000 * perryh@pluto.rain.com (perryh@pluto.rain.com) wrote: > > how to reduce the number of page faults to upgrade program or OS > > performance? > > Install more memory. I can cause paging on my hugely overendowed RELENG_6 system (8GB, ~2GB active) just by reading some big files and churning through cache. It's nice seeing syslogd go into pfault while there's 5G of inactive memory and 300MB cache just waiting to be recycled. There would seem to be some room for tuning on at least some systems. -- Thomas 'Freaky' Hurst http://hur.st/