[CentOS] cache memory not being used

Steve Bergman wrote:

> Also, current kernels are aggressive at freeing up application memory 
> that is rarely used by swapping it out to make more room for caching 
> disk data.  IMO, it's a win. 


Yep, this is a great "feature," especially on something like a busy web 
server that's serving up lots of static content.

Cheers,