Date: Sat, 19 Aug 2017 14:31:49 -0700 From: Mark Johnston <markj@FreeBSD.org> To: Cy Schubert <Cy.Schubert@komquats.com> Cc: freebsd-current@freebsd.org Subject: Re: swapfile query Message-ID: <20170819213149.GA34140@raichu> In-Reply-To: <201708192124.v7JLOJKJ004107@slippy.cwsent.com> References: <Cy.Schubert@komquats.com> <201708192100.v7JL0vFk003935@slippy.cwsent.com> <201708192124.v7JLOJKJ004107@slippy.cwsent.com>
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On Sat, Aug 19, 2017 at 02:24:19PM -0700, Cy Schubert wrote: > In message <201708192100.v7JL0vFk003935@slippy.cwsent.com>, Cy Schubert > writes: > > > (On my -CURRENT laptop I see a scan rate in the hundreds on a totally idle > > laptop and in the teens of my idle firewall. IMO this doesn't seem right, > > at least not compared to previous releases of FreeBSD or from the days when > > I worked on Solaris. You shouldn't see a scan rate on an idle system.) > > It appears that on an idle system with many pages in use, i.e. a laptop > running X and not really doing anything else, pages are scanned though the > system is idle. This is likely an artifact of r308474. It's an intentional consequence of r254304. The page daemon performs a slow and steady scan of the queue of active pages and will gradually move unreferenced pages to the inactive queue.
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