You need to look at your usage. Virtual memory is allocated as a
big file in your hard disk. It is also prone to those issues like
fragmentation. Look at your system resource, and your own judgement
of your system's response. Strike a balance.
Virtual memory is used when your physical memory cannot cater to
needs and the system swaps out some of its content to virtual
memory (on disk). This can be a time consuming process. Too little
phys mem can lead to constant swapping (thrashing).
In general, it's better to up you phys memory first. That will have
the most effect if you find your PC slow. For virtual mem, as long
as your system dun complain that it is running out of memory, good
enough. If you have a big hard disk, you can set it as big as you
want.
