Date: Thu, 2 May 2002 21:07:02 -0400 (EDT) From: Jason Borkowsky <jcborkow@tcpns.com> To: John Baldwin <jhb@FreeBSD.org> Cc: hackers@FreeBSD.org Subject: RE: CPU context switching/load numbers Message-ID: <Pine.BSF.4.44.0205022105500.72825-100000@bemused.tcpns.com> In-Reply-To: <XFMail.20020502182330.jhb@FreeBSD.org>
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> > Greetings! I have a FreeBSD-4.5 box that is a specialized server box. It > > doesn't run any user processes and only runs a bunch of small, server > > efficient processes. > > > > I have an inconsistency that I am trying to explain. When I do a "w" command > > on the box, I see this: > > > > 7:31PM up 74 days, 39 mins, 1 user, load averages: 1.12, 0.94, 0.93 > > > > This says I have a load of 1.12 over the past minute, or, for every > > available CPU interval, I have 1.12 processes requesting the CPU. > > This last bit is where you go wrong. The 1.12 is just for the minute prior to > when you ran the command, it has no relation to any previous minutes. Just > cause it is 1.12 right now doesn't mean the average load for every minute is > 1.12. But these numbers are over months...I have used an expect script to periodically poll the load and vmstat, and save them off to a file. My average load over a three month period is about 0.98, but the average CPU idle time over the same 3 month period is about 85% idle. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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