Date: Tue, 18 Jan 2000 10:51:00 -0600 From: Dan Nelson <dnelson@emsphone.com> To: spork <spork@super-g.com> Cc: freebsd-hackers@FreeBSD.ORG, noc@inch.com Subject: Re: high load, nothing happening? (LONG) Message-ID: <20000118105100.A79849@dan.emsphone.com> In-Reply-To: <Pine.BSF.4.00.10001181137380.10422-100000@super-g.inch.com>; from "spork" on Tue Jan 18 11:40:29 GMT 2000 References: <Pine.BSF.4.00.10001181137380.10422-100000@super-g.inch.com>
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In the last episode (Jan 18), spork said: > I'm trying my luck over here at -hackers, I already posted to > -questions and -isp without any resolution. I'm including my > original post and below that a summary of some responses and my > answers... The bulk of the recent answers seem to say "you should > see a load of 3.0 on a machine with 500 processes", but I don't quite > agree as I have other similar machines that are in production that > don't even approach a load of 1.0 with 3-400 processes. I can only > assume something is wrong somewhere... You all are my last hope... Considering that top is reporting CPU states: 0.0% user, 0.0% nice, 2.7% system, 0.0% interrupt, 97.3% idle I'm not sure what the problem is. You're 97% idle. Maybe the hosted web sites on this machine are slightly more active than the ones on the other box. You could always manually panic the box and see what those three processes on the run queue are, but it doesn't seem to be worth the effort. > [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... 15 second pause as the system does what? Hit ^T to see what the currently running process on the console is, tcpdump the network link and see if you're hanging on a DNS lookup, run "top < /dev/ttyv2 > /dev/ttyv2&" at the top of /etc/rc and see if something's hogging cpu. > 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 > 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 You're running a different httpd here. Try moving the binary from this machine over to the other one and see if the loadavg drops. -- Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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