Is there a command to load all swap into the memory?

RW rwmaillists at
Tue Feb 23 22:01:19 UTC 2010

On Tue, 23 Feb 2010 14:59:28 -0600
John <john at> wrote:

> On Tue, Feb 23, 2010 at 12:24:15PM -0800, Yuri wrote:
> > I am asking out of curiosity.
> > 'top' describes the memory state on my machine like this:
> > Mem: 1085M Active, 196M Inact, 301M Wired, 36M Cache, 112M Buf,
> > 1366M Free Swap: 16G Total, 757M Used, 16G Free, 4% Inuse
> > 
> > There is enough space in memory to load back all swap. Is there a 
> > command to do that for all swap?
> > This will speed up immediate system response in the future.
> Well, you have assumed that the furture demand on the system will
> involve the pages which are swapped out.  If that assumption is
> false, bringing them back into memory now will dramatically slow
> down system responsiveness in the future, because the scarce resoure
> will be free memory pages, which was the reason they were swapped
> out in the first place.  

And AFAIK pages that are read back into memory are retained in swap to
avoid haing to page them out again.

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