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Date:      Fri, 23 Jun 2006 18:11:21 -0500
From:      "Matthew D. Fuller" <fullermd@over-yonder.net>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: vmstat 'b' (disk busy?) field keeps climbing ...
Message-ID:  <20060623231121.GL83482@over-yonder.net>
In-Reply-To: <20060623191131.C1114@ganymede.hub.org>
References:  <20060623172557.H1114@ganymede.hub.org> <261AD16B-C3FE-4671-996E-563053508CE8@mac.com> <20060623191131.C1114@ganymede.hub.org>

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On Fri, Jun 23, 2006 at 07:12:54PM -0300 I heard the voice of
Marc G. Fournier, and lo! it spake thus:
> 
>     31750 vnode pager pageins
>    209538 vnode pager pages paged in
>     15954 vnode pager pageouts
>    219494 vnode pager pages paged out

This may be something to look at.  My workstation (~3.5 day uptime)
has a fraction of that:

     7204 vnode pager pageins
    37609 vnode pager pages paged in
        1 vnode pager pageouts
        1 vnode pager pages paged out

Compare to the number of processes spawned (I'm at 10x yours):

>     28399  fork() calls
>      1708 vfork() calls
>         0 rfork() calls

   282510  fork() calls
    22164 vfork() calls
        0 rfork() calls


That sounds like hefty memory pressure.


-- 
Matthew Fuller     (MF4839)   |  fullermd@over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.



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