Yes, Wayne is correct and the usage is computed exactly as he described. Monit takes the summary of all CPU cores as 100%.
Regards, Martin On Jan 5, 2012, at 10:54 AM, Lawrence, Wayne wrote: > May be wrong and i am sure someone will correct me if i am but it appears the > way the cpu usage is worked out against the multiple cores is why you are > getting this output. > > The way i worked it out is the way i believe monit works it out and the maths > sort of make sense. > > 24 cores 24 x 100% = 2400 > > so if you divide 2400 by your usage from top > > 2400 / 578 = 4.2 > > which would give you your percentage shown in monit. > > Regards > > Wayne > > > > > On 5 January 2012 08:13, Tom Pepper <[email protected]> wrote: > Hello: > > I have a number of high-CPU processes that run on 24-core boxes configured > e.g.: > > check process emr-enc01-01 with pidfile /var/run/tada_liveenc_emr-enc01-01.pid > start program = "/usr/local/tada/launch.sh -c emr-enc01-01" > stop program = "/bin/bash -c 'kill -s SIGTERM `/bin/cat > /var/run/tada_liveenc_emr-enc01-01.pid`'" > if totalmem > 80% then alert > if totalmem > 90% then restart > if totalcpu < 10% for 10 cycles then alert > > These processes create pidfiles which match correctly in top as: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 1710 root 20 0 3064m 1.2g 7808 S 578 15.8 47:31.53 tada_liveenc > > 1866 root 20 0 2954m 1.3g 7804 S 545 16.7 45:18.52 tada_liveenc > > However, monit sees these as a completely different total CPU usage: > > Process 'emr-enc01-01' > status Running > monitoring status Monitored > pid 1710 > parent pid 1 > uptime 8m > children 0 > memory kilobytes 1372300 > memory kilobytes total 1372300 > memory percent 16.7% > memory percent total 16.7% > cpu percent 4.1% > cpu percent total 4.1% > data collected Thu, 05 Jan 2012 00:05:49 > > Process 'emr-enc01-02' > status Running > monitoring status Monitored > pid 1866 > parent pid 1 > uptime 8m > children 0 > memory kilobytes 1362240 > memory kilobytes total 1362240 > memory percent 16.6% > memory percent total 16.6% > cpu percent 4.1% > cpu percent total 4.1% > data collected Thu, 05 Jan 2012 00:05:49 > > Any thoughts on why this might be happening? Hosts are ubuntu natty. The > master processes themselves spawn about 150 threads (not forks). > > FYI: > > 662 root@enc01[tada]: $ uname -m > x86_64 > > 663 root@enc01[tada]: $ file `which monit` > /usr/local/bin/monit: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), > dynamically linked (uses shared libs), for GNU/Linux 2.6.0, not stripped > > 664 root@enc01[tada]: $ monit -V > This is Monit version 5.3.2 > Copyright (C) 2000-2011 Tildeslash Ltd. All Rights Reserved. > > Thanks in advance, > -Tom > > -- > To unsubscribe: > https://lists.nongnu.org/mailman/listinfo/monit-general > > -- > To unsubscribe: > https://lists.nongnu.org/mailman/listinfo/monit-general
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