Date: Mon, 19 Aug 2013 22:44:23 -0600 From: Scott Long <scott4long@yahoo.com> To: Jeff Roberson <jeff@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r254544 - head/sys/vm Message-ID: <16628F63-B2B5-42C5-A537-4AD87456C2F2@yahoo.com> In-Reply-To: <201308192354.r7JNsPD1007503@svn.freebsd.org> References: <201308192354.r7JNsPD1007503@svn.freebsd.org>
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On Aug 19, 2013, at 5:54 PM, Jeff Roberson <jeff@FreeBSD.org> wrote: > Author: jeff > Date: Mon Aug 19 23:54:24 2013 > New Revision: 254544 > URL: http://svnweb.freebsd.org/changeset/base/254544 >=20 > Log: > - Increase the active lru refresh interval to 10 minutes. This has = been > shown to negatively impact some workloads and the goal is only to > eliminate worst case behaviors for very long periods of paging > inactivity. Eventually we should determine a more complex scaling > factor for this feature. > - Rate limit low memory callback handlers to limit thrashing. Set = the > default to 10 seconds. A more primitive version of this was tested at Netflix and found to be = very advantageous. Thanks for turning it into a more polished thing. Scott
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