Date: Mon, 5 Feb 2001 17:49:56 -0500 (EST) From: scanner@jurai.net To: Dan Phoenix <dphoenix@bravenet.com> Cc: freebsd-hackers@FreeBSD.ORG, freebsd-question@FreeBSD.ORG Subject: Re: qmail IO problems Message-ID: <Pine.BSF.4.21.0102051721460.28470-100000@sasami.jurai.net> In-Reply-To: <Pine.BSO.4.21.0102051342380.18264-100000@gandalf.bravenet.com>
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> /0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100 > ad0 MB/s > tps|XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX108.83 > that is why i know it is IO....#1. Ok there is your first problem. Using a single IDE disk as your mail store is fine if your in a small lan. But your obviously beating the living tar out of it. Upgrade to SCSI or at least add more disks and vinum them together. > #2..not configuration errors that I know of. Hmm. > tailing the tcpserver current log shows lots of traffic comming in and > out.....yet it keep getting queued up......so my guess is the IO. Again are you using hashed directories? If so what depth? > Post fix is not the solution...would be the exact same problem...a mail > deamon was to read each message to send them right? Same disk I/O problem Actually wrong. Qmail writes 3 files for each mail, Postfix writes one. Do the math. Thats a 300% overhead compared to Postfix. > will occur. Btw who are you and when you say brad....who are you talking > about? I am someone trying to help you. And im referring to brad knowles. He is a pretty big mail guy. How many mails WERE you doing on linux? How many are you doing now? I can completely understand your I/O bottle neck using a single IDE disk. What kind of load are you doing? how much traffic. You might not even be able to do anything except add more I/O. And my guess is if Linux didnt have this problem then it's obvious to me anyway that FreeBSD is handling alot more mail in and out then linux was and is therefore taxing your single IDE mail storage. But again with out #'s of how many mails you were doing on linux and how many your doing now it's all theory. ============================================================================= -Chris Watson (316) 326-3862 | FreeBSD Consultant, FreeBSD Geek Work: scanner@jurai.net | Open Systems Inc., Wellington, Kansas Home: scanner@deceptively.shady.org | http://open-systems.net ============================================================================= WINDOWS: "Where do you want to go today?" LINUX: "Where do you want to go tommorow?" BSD: "Are you guys coming or what?" ============================================================================= irc.openprojects.net #FreeBSD -Join the revolution! ICQ: 20016186 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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