Date: Mon, 17 Jan 2000 16:13:57 -0800 From: Nathan <nathan@khmere.com> To: freebsd-isp@FreeBSD.ORG Subject: [Fwd: Fwd: high load, nothing happening? (LONG)] Message-ID: <3883B045.134D0E22@khmere.com>
next in thread | raw e-mail | index | archive | help
This is a multi-part message in MIME format. --------------C212CAC3CBE4E039D58C540A Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I have a question.... I noticed that your box has a Mylex card in it ? is this right ? I thought that thier is no support for Mylex cards in FreeBSD..... or am I wrong ? or is this an external raid card ? thank you nathan --------------C212CAC3CBE4E039D58C540A Content-Type: message/rfc822 Content-Transfer-Encoding: 7bit Content-Disposition: inline Return-Path: MJS@getrelevant.com Received: from freefall.impresso.com (freefall.connectinc.com [206.132.164.131]) by ns3.khmere.com (8.9.2/8.8.7) with ESMTP id AAA07753 for <nathan@khmere.com>; Tue, 18 Jan 2000 00:06:38 GMT Received: (from inetgate@localhost) by freefall.impresso.com (8.9.3/8.9.3) id QAA16996; Mon, 17 Jan 2000 16:00:47 -0800 (PST) Date: Mon, 17 Jan 2000 16:00:47 -0800 (PST) Message-Id: <200001180000.QAA16996@freefall.impresso.com> From: Mark Steckel <MJS@getrelevant.com> Subject: Fwd: high load, nothing happening? (LONG) X-Mozilla-Status2: 00000000 >Delivered-To: freebsd-isp@freebsd.org >Date: Mon, 17 Jan 2000 12:30:55 -0500 (EST) >From: spork <spork@super-g.com> >X-Sender: spork@super-g.inch.com >To: freebsd-isp@FreeBSD.ORG >Cc: noc@inch.com >Subject: high load, nothing happening? (LONG) >Sender: owner-freebsd-isp@FreeBSD.ORG >X-Loop: FreeBSD.org > >Hi, > >I'm trying my luck over here, I already posted to -questions without any >resolution. I'm including my original post and below that a summary of >some responses and my answers... > >[begin orginal post] >We just built a large webserver machine (PII-450, 896MB RAM, 30-odd G of >Mylex RAID, 3.3-R) that constantly runs a load of from 1 to 3, even though >it's not doing anything (still sitting as a staging server). The initial >startup is also very slow; after about 40 of the servers start there's >about a 15 second pause, then another 40, pause, etc... > >This box is running about 170 virtual hosts (and a full class C >of addresses aliased to fxp0) under Apache 1.3.9, with each vhost running >as it's own user and starting 3 servers at startup, so there are a large >*number* of processes, but no swapping with about half a gig of RAM left >free. > >I have maxusers at 512, NMBCLUSTERS at 4096, and the following sysctl >adjustments: > >kern.maxproc: 8212 >kern.maxfiles: 100000 kern.maxfilesperproc: 16424 >kern.maxprocperuid: 8211 kern.ipc.somaxconn: 512 > >This is all gathered from various "tuning for a big webserver" posts from >the various FBSD lists. > >systat, vmstat, iostat all look normal, and I've not seen any curious >entries in the logs. > >So that's the info, my questions are "why the load", and "is that OK"? >Something seems wrong here, but I'm at a loss. > >Any ideas where to start looking? > >[followup #1] > > > What does top(1) report? > >last pid: 23684; load averages: 3.74, 1.96, 1.46 up 7+21:10:15 10:35:38 >449 processes: 1 running, 448 sleeping >CPU states: 0.0% user, 0.0% nice, 2.7% system, 0.0% interrupt, 97.3% idle >Mem: 62M Active, 355M Inact, 45M Wired, 8350K Buf, 418M Free >Swap: 784M Total, 784M Free > > PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND >23684 root 30 0 1976K 944K RUN 0:00 3.08% 0.29% top > 904 root 2 -12 1036K 720K select 0:31 0.00% 0.00% xntpd > 4163 root 2 0 1468K 1096K select 0:13 0.00% 0.00% >httpd-apache_1 > 3399 root 2 0 1468K 1096K select 0:13 0.00% 0.00% >httpd-apache_1 > >[followup #2] > > > that value for NMBCLUSTERS is going to be lower than what maxusers at > > 512sets it to, try 16384 or leave it up to maxusers. > >[followup #3] > > > Hum....that could certainly contribute to load. Have you checked vmstat > ^^^^ (he's referring to the number of processes) > > to see what the system calls are like (frequency that is). > >Nothing's blocked, and the other numbers look very similar to much smaller >boxes doing nothing: > >procs memory page disks faults cpu >r b w avm fre flt re pi po fr sr da0 fd0 pa0 in sy cs us sy id >0 0 0 106760426976 2 0 0 0 2 0 0 0 0 230 474 155 0 0 99 >0 0 0 106760426976 4 0 0 0 0 0 0 0 0 233 408 136 0 2 98 >0 0 0 106760426976 3 0 0 0 0 0 0 0 0 235 408 136 0 2 98 > >[followup #4] > > > what ???? > > you are asking why high load ??? > > don;t you see you have 500 processes on your box ?? > > it's normal to have 3 of load average if you got 500 processes! > >Here's a snippet from a shell/web server that is doing actual work. It >has less memory, a slower processor and a number of interactive users. >The load however rarely climbs above 1.0 unless a process goes runaway: > >last pid: 25042; load averages: 0.38, 0.35, 0.63 13:26:43 >301 processes: 1 running, 300 sleeping >CPU states: 0.4% user, 0.0% nice, 0.8% system, 0.8% interrupt, 98.1% idle >Mem: 119M Active, 44M Inact, 36M Wired, 34M Cache, 6027K Buf, 17M Free >Swap: 640M Total, 37M Used, 603M Free, 6% Inuse > > PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND >25040 root 28 0 844K 1120K RUN 0:00 1.89% 0.34% top >24823 freddy 2 0 4180K 2964K select 0:00 0.23% 0.23% pine4.21 >24919 byman 3 0 796K 1040K ttyin 0:00 0.04% 0.04% tcsh >24537 inch_hom 2 0 640K 872K sbwait 0:00 0.04% 0.04%httpd-1.3.3-us > >So I'd kind of assume I wouldn't see a radical difference between a >machine with 500 idle processes and one that's running 300 and is in >active use... > >So if anyone even has a similarly configured box, I'd love to hear from >you. I feel something is wrong here, but I can't find it... > >Thanks, > >Charles > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-isp" in the body of the message Mail Sent: January 17, 2000 4:06 pm PST Item: R01XvSG --------------C212CAC3CBE4E039D58C540A-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3883B045.134D0E22>