From owner-freebsd-stable@FreeBSD.ORG Sat Jun 24 17:11:16 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 55BA716A49A for ; Sat, 24 Jun 2006 17:11:16 +0000 (UTC) (envelope-from fullermd@over-yonder.net) Received: from mail.localelinks.com (web.localelinks.com [64.39.75.54]) by mx1.FreeBSD.org (Postfix) with ESMTP id F3B9543D45 for ; Sat, 24 Jun 2006 17:11:15 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from draco.over-yonder.net (adsl-072-148-013-213.sip.jan.bellsouth.net [72.148.13.213]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.localelinks.com (Postfix) with ESMTP id A32873E1; Sat, 24 Jun 2006 12:11:15 -0500 (CDT) Received: by draco.over-yonder.net (Postfix, from userid 100) id EBECA61C2B; Sat, 24 Jun 2006 12:11:14 -0500 (CDT) Date: Sat, 24 Jun 2006 12:11:14 -0500 From: "Matthew D. Fuller" To: "Marc G. Fournier" Message-ID: <20060624171114.GP83482@over-yonder.net> References: <20060623172557.H1114@ganymede.hub.org> <261AD16B-C3FE-4671-996E-563053508CE8@mac.com> <20060623191131.C1114@ganymede.hub.org> <20060623231121.GL83482@over-yonder.net> <20060623220204.L1114@ganymede.hub.org> <20060624013305.GN83482@over-yonder.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060624013305.GN83482@over-yonder.net> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.11-fullermd.3 Cc: freebsd-stable@freebsd.org Subject: Re: vmstat 'b' (disk busy?) field keeps climbing ... X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Jun 2006 17:11:16 -0000 On Fri, Jun 23, 2006 at 08:33:05PM -0500 I heard the voice of Matthew D. Fuller, and lo! it spake thus: > > It's the vnode pager, not the swap pager. AIUI, that's mostly > paging in and out pages of running binaries (from the image on > disk), not moving stuff in and out of swapspace. Actually, as I think of it, I think the vnode pager would also be the part used faulting pages in and out of mmap()'d files, which could point at the database. Memory pressure from that wouldn't result in swapping, since clean pages would just get tossed and dirty pages would be synced and tossed. In that case it may not be so much a 'problem', as just 'normal' for your case, and your actual problem may be somewhat elsewhere. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.