> swappiness does not help, if swap is really needed (like when compiling
> kdepim).

I did not reconize yet that kdepim is that hungry at compile time :).

> The 'stupid' thing is, as soon as swap is used, it stays that way, 
> no matter how many hundred mb of ram are free.

The reason for that behaviour is, that in my opinion it would be nonsense to 
delete things from the swap when there is enough swap space free. But I think 
you can be sure that if there is enough ram free that the things will also be 
in the ram again. Things are kept (duplicated) in the swap space if there is 
enough swap because it's faster when it's necessary to swap out the same 
things again, I think.

That's just a theory. I don't know for sure if I'm right.

rgds
Bernhar
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