Date: Mon, 18 Jan 1999 04:05:32 -0500 (EST) From: "John S. Dyson" <root@dyson.iquest.net> To: dillon@apollo.backplane.com (Matthew Dillon) Cc: dg@root.com, jkh@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: Found problem w/ Paging performance over NFS Message-ID: <199901180905.EAA25734@dyson.iquest.net> In-Reply-To: <199901180514.VAA57485@apollo.backplane.com> from Matthew Dillon at "Jan 17, 99 09:14:25 pm"
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> This is pretty cool - I figured out why the paging performance is so > horrible over NFS but good to local disk. > > It turns out that the NFS subsystem looks at B_ASYNC in the bp. This > flag is not set by the paging code, so the NFS writes requested by the > pageout daemon were being done synchronously. > ... > > I've also upgraded my LAN to 100BaseTX to test it. With 4 nfsiod's > running, I am getting excellent paging performance to NFS swap - 1.5 to > 2.5 megabytes a second on pageout instead of 250 KBytes/sec. The diskless > workstation now pages out as well as a normal server! > Intergalactic!!! :-). John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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