[Novalug] Do I have a memory leak??

[Beartooth]

 	One of my machines, running Fedora 9, had gotten 
excruciatingly slow; and the first graph in the system monitor on 
the panel, showing memory and swap, was nearly always maxxed out 
-- reading in the upper nineties.

 	I had more memory installed, doubling what it had before. 
Big improvement -- for a few days. Now it's as before.

 	How do I tell what the problem is and what to do about 
it? Or can I? (Remember I don't code, and I don't speak 
hardware.) Fwiw, I'm not having similar problems with my other 
Fedora machines.

-- 
Beartooth Staffwright, Not Quite Clueless Power User
Fedora 8 & 9; Alpine 1.10, Pan 0.132; Privoxy 3.0.6;
Dillo 0.8, Epiphany 2, Firefox 2 & 3, Galeon 2, Opera 9
Remember I know little (precious little!) of where up is.