Date: Sat, 24 Jun 2006 12:11:14 -0500 From: "Matthew D. Fuller" <fullermd@over-yonder.net> To: "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-stable@freebsd.org Subject: Re: vmstat 'b' (disk busy?) field keeps climbing ... Message-ID: <20060624171114.GP83482@over-yonder.net> In-Reply-To: <20060624013305.GN83482@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>
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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.
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