Date: Fri, 9 Nov 2007 10:19:14 +0700 (WIT) From: "binto" <binto@triplegate.net.id> To: "Doug Clements" <dclements@gmail.com> Cc: binto <binto@triplegate.net.id>, freebsd-hackers@freebsd.org Subject: Re: page fault & degaradation performance Message-ID: <1318.202.127.98.144.1194578354.squirrel@webmail.triplegate.net.id> In-Reply-To: <54da514e0711081429g5535598exef08cb46765fa591@mail.gmail.com> References: <4635.202.127.98.144.1194407276.squirrel@webmail.triplegate.net.id> <54da514e0711071023g565cf98ay54ff2bb9cfeeb38a@mail.gmail.com> <28483.202.123.224.34.1194493720.squirrel@webmail.triplegate.net.id> <54da514e0711081429g5535598exef08cb46765fa591@mail.gmail.com>
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Btw, what is page replacement algorithm that used by FreeBSD...sorry I'm newbie..LRU or another algorithm? > Running out of memory and having to continually swap things in and out > of ram degrades performance, yes. Page faults are simply how the > virtual memory subsystem gets things done, like pulling things out of > swap. > > --Doug > > On Nov 7, 2007 7:48 PM, binto <binto@triplegate.net.id> wrote: >> Btw >> >> Even page fault isn't a terrible thing, but she could make >> trashing condition..that can degrade CPU utilization, am i correct? >> >> >> >> >> >> >> > On 11/6/07, binto <binto@triplegate.net.id> wrote: >> >> >> >> I just wanna know, >> >> how to reduce the number of page faults to upgrade program or OS >> >> performance? >> >> is there any parameters that i must set if i reduce the number of >> page >> >> fault? >> > >> > >> > Don't forget that some amount of page faults are normal consequences >> of >> > using a machine with virtual memory. Page faults alone are not an >> > indicator >> > that you're out of memory or suffering in any way, they just mean that >> > something was requested in vm that wasn't actually in ram, and needed >> to >> > be >> > loaded. Ask 'swapinfo' or 'top' to see if you might possibly benefit >> from >> > more ram by reducing paging. >> > >> > --Doug >> >> > _______________________________________________ >> > freebsd-hackers@freebsd.org mailing list >> > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> > To unsubscribe, send any mail to >> "freebsd-hackers-unsubscribe@freebsd.org" >> > >> >> >> >
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