> I have a "appliance" box, a basic mail server.  Currently it has 128MB
> RAM.  I installed it with a 256MB swap file, following the "swap size is
> 2x RAM size" rule of thumb.
> 
> Now I have 128MB more to add.  Should I use parted or another tool to
> increase the swap size to 512MB or does it not really matter much?

Look at top before you shutdown the system (preferably when it is at its 
busiest).  It should display the amount of swap space in use.  If this is still 
mostly free, then probably best to leave it at the current size.  Watch it over 
time.  If you start really filling swap, consider adding more Physical RAM 
rather than increasing swap.
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