Swap - forcing Swap

[snpe]

> 
> it depends. Imagine a large unused program (like a JVM with around
> 500mb) which you don't use always (think i2p anonymity proxy). You do
> not want that program to fill your RAM. This programs memory can be
> swapped out and the free memory used for cache.
>
why - if you have free memory , yet

> > You can't force usage of swap 
> 
> wrong: you can use some /proc/sys/vm parameters to do this.
> 
you can control (litle), but can't force system for swapping if system have free main memory
> > and you don't want this
> 
> depends upon your usage patterns.
> 
no, you don't want and you can't