Memory dumper

wondering if there was something that cleans out your memory while the computer is running. like if you've had your comp running for a while,and shit has built up and the computer is getting sluggish, you can dump your memory w/o rebooting... anyone know of something like that?

>>5
so pretty much, if i have xp, and my computer is sluggish, it's more likely that i should be upgrading my ram than looking to forcably dump the ram i have now?