Date: Thu, 03 May 2001 19:06:27 -0700 From: Mike Smith <msmith@freebsd.org> To: Doug Hardie <bc979@lafn.org> Cc: Marius <marius@mail.communityconnect.com>, Ramon A Hermon <rahermon@iastate.edu>, freebsd-stable@FreeBSD.ORG Subject: Re: Mem Use Message-ID: <200105040206.f4426RJ05318@mass.dis.org> In-Reply-To: Your message of "Thu, 03 May 2001 18:11:32 PDT." <f04330109b717b1467e7d@[10.0.1.100]>
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> >>Mem: 109M Active, 138M Inact, 38M Wired, 2752K Cache, 48M Buf, 87M Free
> >>Swap: 100M Total, 1224K Used, 99M Free, 1% Inuse
>
> My systems look very much like this also. Do note that there is 87
> MB free and 1 MB that some time in the past got swapped out.
That's 87MB of totally unused memory, ie. wasted money. 8)
> Whatever was swapped out never comes back to say regardless of the
> available free space.
This is not correct; swap space is recovered when regions are unmapped
and when a process exits.
> One of my systems started swapping for a short
> time about 6 months ago. I show constant swapin of that process all
> the time through today even though there is over 50 MB of free space.
> It would appear that some tuning of the swapin algorithm would be
> helpful.
Unlikely; it's more that because the region swapped out is backed by swap
pages, it's considered cheaper to throw away than other regions might be.
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
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