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Date:      Mon, 26 Jun 2006 18:55:17 -0300 (ADT)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Max Laier <max@love2party.net>
Cc:        Kostik Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org, Dmitry Morozovsky <marck@rinet.ru>
Subject:   Re: vmstat 'b' (disk busy?) field keeps climbing ...
Message-ID:  <20060626185437.I1114@ganymede.hub.org>
In-Reply-To: <200606262244.25505.max@love2party.net>
References:  <20060624221556.O30039@woozle.rinet.ru> <20060626143038.GK79678@deviant.kiev.zoral.com.ua> <20060626152345.M1114@ganymede.hub.org> <200606262244.25505.max@love2party.net>

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On Mon, 26 Jun 2006, Max Laier wrote:

> On Monday 26 June 2006 20:25, Marc G. Fournier wrote:
>> I think I might have found *at least* one of the problems, and that being
>> the excessively high blocked states while ps isn't finding anything ...
>>
>> MySQL
>>
>> We just recently started allowing clients to run a MySQL server *within*
>> their vServer ... in a drastic move, I just shut them all down on pluto,
>> and blocked drop'd from ~86 down to 5 in a matter of moments ...
>> restarting them all has it climbing once more, being up around 22 already
>> ...
>>
>> I'm going to go with that theory for now, and keep an eye on things ...
>>
>> Just curious as to why, even with -H, its not showing any blocked states
>> within ps though ... ?
>
> The "blocked" column shows also processes that have objects "paging". 
> Most likely you are *short* on memory.  In order to relieve the pressure 
> program .text pages are free'ed and need to be refetched from disc 
> whenever the respective code is being executed.

'k, but shouldn't the OS be doing any swapping, if this was the case?  I'm 
getting <1M of swappage when the blocked pages are really high ...

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email . scrappy@hub.org                              MSN . scrappy@hub.org
Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664



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