Date: Sun, 20 Apr 2003 17:28:42 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: freebsd-current@freebsd.org Subject: Re: Broken memory management on system with no swap Message-ID: <Pine.BSF.4.21.0304201727070.54473-100000@InterJet.elischer.org> In-Reply-To: <200304201924.h3KJOxWo090302@apollo.backplane.com>
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On Sun, 20 Apr 2003, Matthew Dillon wrote: > note (1): normally act_count protects against thrashing. It is the > active queue's act_count algorithm which gives FreeBSD's such a nice > smooth degredation curve when memory loads become extreme by preventing > a frequently accessed page from being freed too early, so we don't > want to just turn it off. Maybe we need a test for 'too many active > pages', aka when > 80% of available pages are in the active queue > to temporarily disable the act_count test. I guess just raising the bar as to what a page needs, to be considdered "active" would have that effect.
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