Date: Tue, 18 Jan 2000 13:57:50 -0500 (EST) From: spork <spork@super-g.com> To: Dan Nelson <dnelson@emsphone.com> Cc: freebsd-hackers@FreeBSD.ORG, noc@inch.com Subject: Re: high load, nothing happening? (LONG) Message-ID: <Pine.BSF.4.00.10001181355440.10422-100000@super-g.inch.com> In-Reply-To: <20000118105100.A79849@dan.emsphone.com>
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On Tue, 18 Jan 2000, Dan Nelson wrote: > In the last episode (Jan 18), spork said: > 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. That's another thing, the box is idle as we've yet to move it into production. Out of curiousity, how does one make a machine panic manually? I'll investigate throwing another httpd on there as well to see what happens... Thanks, Charles > > [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 > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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