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Date:      Mon, 03 Apr 2000 10:19:02 -0700
From:      David Greenman <dg@root.com>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Kevin Day <toasty@dragondata.com>, current@FreeBSD.ORG
Subject:   Re: Load average calculation? 
Message-ID:  <200004031719.KAA09185@implode.root.com>
In-Reply-To: Your message of "Sun, 02 Apr 2000 20:49:10 PDT." <200004030349.UAA52843@apollo.backplane.com> 

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>:I'm not sure if this is -current fodder or not, but since it's still
>:happening in -current, I'll ask.
>:
>:We recently upgraded a server from 2.2.8 to 4.0(the same behavior is shown
>:on 5.0-current, too). Before, with the exact same load, we'd see load
>:averages from between 0.20 and 0.30. Now, we're getting:
>:
>:load averages:  4.16,  4.23,  4.66
>:
>:Top shows the same CPU percentages, just a much higher load average for the
>:same work being done. Did the load average calculation change, or something
>:with the scheduler differ? Customers are complaining that the load average
>:is too high, which is kinda silly, since 4.0 seems noticably faster in some
>:cases.
>:
>:Any ideas?
>:
>:Kevin
>
>    I believe the load average was changed quite a while ago to reflect not
>    only runnable processes but also processes stuck in disk-wait.  It's
>    a more accurate measure of load.

   It's always been that way in BSD.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org
Creator of high-performance Internet servers - http://www.terasolutions.com
Pave the road of life with opportunities.


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