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Date:      16 Nov 2002 10:23:09 -0800
From:      swear@attbi.com (Gary W. Swearingen)
To:        Jerry McAllister <jerrymc@clunix.cl.msu.edu>
Cc:        jonas@netwood.net (Jonas Fornander), FreeBSD-Questions@FreeBSD.ORG ('FreeBSD LIST')
Subject:   Re: Running out of swap space?????
Message-ID:  <ehheehe5ma.eeh@localhost.localdomain>
In-Reply-To: <200211152201.gAFM1ha27744@clunix.cl.msu.edu>
References:  <200211152201.gAFM1ha27744@clunix.cl.msu.edu>

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Jerry McAllister <jerrymc@clunix.cl.msu.edu> writes:

> Sort of true, though real memory is still different from swap and a 
> busy system wth a lot of processes hanging around can use a lot of swap
> even when it isn't killing real memory.

The fact that the system CAN or DOES use a lot of swap doesn't mean that
it NEEDS to use a lot of swap or that it buys you much.  It can just be
hanging on to data in case it will need it in the future; often it will
never need it and even when it does, the time saved is negligible in
most cases and definitely so when devising rules of thumb (because you
don't devise them to support efficient thrashing).

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