Simple swap question

Jerry McAllister jerrymc at
Fri Dec 19 04:13:08 UTC 2008

On Thu, Dec 18, 2008 at 12:02:06PM -0500, FreeBSD wrote:

> Daniel Bye a écrit :
> >On Thu, Dec 18, 2008 at 10:28:18AM -0600, Kirk Strauser wrote:
> >>On Thursday 18 December 2008 09:16:10 FreeBSD wrote:
> >>>Hi everyone,
> >>>
> >>>I have a FreeBSD 7.0-Release server that started to swap after an error
> >>>in a shell script (process spawning competition ;-) ). I killed the
> >>>shell and the RAM is now OK. The problem is that the swap is still used.
> >>>How can I "reset" the swap?
> >>You don't.  The system will handle it for you, I promise.  :-)
> >
> >And very well, too.
> >
> >You can prompt it to move pages back into RAM if you start using a swapped-
> >out process again - say, for example, a quiescent word processor had been
> >swapped out, you could get it back by raising it and starting to type.
> >
> >But as Kirk said, there really is no need. It's one of the kernel's many
> >jobs, and I'm inclined to leave it get on with it!
> >
> >Dan
> >
> Thanks for your answer. I'm asking here because it's been several days 
> and there is still used swap for data that should never be used anymore. 
> If the kernel wants to keep it, why not move it to RAM now that there is 
> some free?

Why bother if it isn't being currently used?


> Martin
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