Date: Wed, 9 Feb 2000 18:49:19 -0600 From: "Travis Leuthauser" <travis@winconx.com> To: <freebsd-questions@freebsd.org> Subject: Re: high load averages on mail server Message-ID: <037d01bf7360$a9f93740$20503cd0@travis>
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You could always switch to qmail. Qmail stores mail in the user's home directory with each message in it's own file. That configuration makes it a snap to set up quotas on the user's directory controlling both the amount of mail they have as well as any other files in one lump sum. Also if for some horrible reason you have a system crash while mail is being delivered, the only messages that run the risk of corruption are the messages being delivered when the machine dies instead of their entire mail spool. I won't go into the numerous security enhancements qmail has over sendmail, but it's certainly well worth looking at. Check out http://www.pobox.com/~djb for more info on qmail. (Warning: This message is full of my personal opinions, but they happen to be shared by a great many people). Travis Leuthauser Network Administrator DDS Group > ----- Original Message ----- > From: "Systems Technician" <systech@maui.net> > To: <questions@freebsd.org> > Sent: Wednesday, February 09, 2000 1:17 PM > Subject: high load averages on mail server > > > > Aloha, > > > > I'm stumped! Here's what I got FreeBSD 3.4 running Sendmail 8.9.3 > > and Cucipop for POP. (I've tried qpopper and no noticeable difference.) > > Anyhow, my load averages just skyrocket from 8 - 5pm, especially in the > morning > > when people are checking their email at work or home. I attached a print > out > > of 'w', 'top', 'vmstat 1', and 'systat -vm 1'. > > > > I have 384M of RAM, but it looks to me, using 'systat -vm 1' that the > > box is only using a small portion of it. This doesn't look right to me > and > > I'm wondering if this is indicative of bad memory. Lastly, I only see > this > > happening when there are a large number of connections being made to this > box. > > Perhaps this is an i/o probably, but I too stupid to figure that out. > Like > > always any help will be appreciated and I'll mail a box of chocolate cover > > Macadamia Nuts to the person that helps out the most...that should get you > > going! ;) > > > > > > ------------------------------------------------------------------------ > > (mach)10:28am# w > > 10:28AM up 20:18, 5 users, load averages: 11.58, 10.81, 10.18 > > > > ------------------------------------------------------------------------ > > (mach)10:28am# top > > last pid: 53568; load averages: 5.27, 7.97, 9.10 up 0+20:21:24 > 10:31:39 > > 74 processes: 5 running, 69 sleeping > > CPU states: 70.5% user, 0.0% nice, 27.6% system, 1.9% interrupt, 0.0% > idle > > Mem: 52M Active, 283M Inact, 23M Wired, 10M Cache, 8348K Buf, 8588K Free > > Swap: 513M Total, 513M Free > > > > PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND > > 53298 xxxxxxx 91 0 1188K 852K RUN 0:22 29.02% 26.76% cucipop > > 53391 root 57 0 1860K 1016K RUN 0:03 9.46% 6.15% top > > 53508 xxxxxxx 92 0 1128K 792K RUN 0:01 17.88% 4.64% cucipop > > 107 root 2 0 6904K 6348K select 2:28 1.61% 1.61% named > > > > (mach)10:44am# vmstat 1 > > procs memory page disks faults cpu > > r b w avm fre flt re pi po fr sr da0 da1 da2 in sy cs us > sy id > > 12 0 0 41880 19652 354 0 0 0 327 15 0 0 0 313 1162 128 49 > 17 34 > > 8 0 0 38760 20584 258 0 0 0 471 0 17 0 3 329 851 204 88 > 12 0 > > 2 0 0 35080 21352 306 0 0 0 509 0 6 0 5 333 961 209 87 > 13 0 > > > > ------------------------------------------------------------------------ > > (mach)10:44am# systat -vm 1 > > 5 users Load 15.70 8.52 7.58 Tue Feb 8 10:46 > > > > Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER > > Tot Share Tot Share Free in out in out > > Act 26644 2056 41060 2632 26464 count > > All 372872 5176 4060400 10736 pages > > 5 cow > Interrupts > > Proc:r p d s w Csw Trp Sys Int Sof Flt 22 zfod 291 > total > > 6 33 92 35 312 290 49 39 23312 wire 100 clk0 > irq0 > > 54968 act 128 rtc0 > irq8 > > 6.1%Sys 1.5%Intr 92.4%User 0.0%Nice 0.0%Idl 279888 inact 58 pci > irq11 > > | | | | | | | | | | 14564 cache 5 pci > irq10 > > ===+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 11900 free pci > irq9 > > daefr fdc0 > irq6 > > Namei Name-cache Dir-cache 88 prcfr > atkbd0 irq > > Calls hits % hits % react sio0 > irq4 > > 16 16 100 pdwak sio1 > irq3 > > pdpgs > > Discs da0 da1 da2 sa0 fd0 ch0 intrn > > KB/t 0.00 0.00 64.00 0.00 0.00 0.00 8344 buf > > tps 0 0 3 0 0 0 100 dirtybuf > > MB/s 0.00 0.00 0.18 0.00 0.00 0.00 32260 desiredvnodes > > % busy 0 0 3 0 0 0 5343 numvnodes > > 2882 freevnodes > > > > -- > > J o n B a d u a S y s t e m s T e c h n i c i a n > > systech@maui.net voice: 875-2535 fax: 875-2539 > > 590 Lipoa Parkway, Ste.266 Kihei, Maui, Hawaii 96753 > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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