Y The figure(s) can be found in Activity Monitor. If it's in the multiples of thousands quite quickly then you'll probably benefit from a RAM upgrade. Always get RAM from a dealer who supports Macs and will replace dead sticks.
Open Activity Monitor and click on System Memory. They (page ins and page outs) should be listed near the bottom. Remember that the actual figures don't matter so much as the rate at which they accumulate.
Where exactly do I go to see these figures?