Date: Fri, 09 Jul 1999 01:38:05 -0700 From: David Greenman <dg@root.com> To: junkmale@xtra.co.nz Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Uptime basics!!! Message-ID: <199907090838.BAA08058@implode.root.com> In-Reply-To: Your message of "Fri, 09 Jul 1999 20:30:30 %2B1200." <19990709083321.GYOW112692.mta2-rme@wocker>
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>On 8 Jul 99, at 19:41, David Greenman wrote: > >> Uh, no, that is not what the load average means. The load average is a >> composite number that includes both runnable processes and processes that >> are blocked in a short term wait (usually disk I/O). This means that for >> machines that are doing heavy disk I/O, the load average could be quite >> high even when the CPU is 95% idle. On wcarchive, for example, the load >> average typically runs around 40-50 with 50% CPU idle time. This may sound >> high, but there are 38 disk drives on the machine, so although the drives >> are fairly busy, the I/O is spread out over all of them - keeping the >> interactive response time low and overall performance quite high. > >Where is this documented? I was trying to locate just this very >information during the past week. Nothing in man uptime. If it belongs >there, I volunteer to update it. How? It should be documented in the man page for 'uptime' and 'w', but I see that 'w' gets it wrong and 'uptime' doesn't say anything. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org Creator of high-performance Internet servers - http://www.terasolutions.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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