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Date: Mon, 21 Feb 2005 13:33:37 -0800
From: "David G. Lawrence" <dg@dglawrence.com>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
Message-ID: <20050221213337.GC87259@opteron.dglawrence.com>
References: <20050221210834.GB87259@opteron.dglawrence.com>
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cc: Christian Jachmann <Jachmann@unitix.org>
cc: Robert Watson <rwatson@freebsd.org>
cc: David Schultz <das@freebsd.org>
cc: current@freebsd.org
Subject: Re: Load over 1000
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> In message <20050221210834.GB87259@opteron.dglawrence.com>, "David G. Lawrence"
>  writes:
> >> aren't being serviced isn't a bug.  The reason the load on systems with
> >> many processes is typically low is that most processes are blocked on I/O
> >> -- either waiting for it to complete, waing for a network packet, or
> >> waiting for the user, so they're idle the rest of the time.  The CPU sits
> >> there waiting for the world to catch up...
> >
> >   The load average has historically meant the number of processes either
> >running/ready to run OR blocked by short term (disk I/O) wait. 
> 
> No, disk I/O sleeps is not involved.
> 
> The loadavg is the length of the runqueue.  Any process sleeping,
> on network, disk or timer, is not counted towards the total.

   I said "historically". :-)
   This was changed in FreeBSD a some years ago.

-DG

David G. Lawrence
President
Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500
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