Hobbit Memory is Yellow but it's just normal

Hi All,

I have a server who's memory keeps going Yellow:

Mon Oct 15 14:50:27 PDT 2007 - Memory low

Memory              Used       Total  Percentage

green Physical 7820M 8055M 97% yellow Actual 7341M 8055M 91% green Swap 0M 8055M 0%

And so it is; these numbers do match the free numbers. But it's
not really all being used, it's just the way Linux works.

I'm really only using ~1.5 Gb of 8 and the rest is 'Slab' - which is
kept around by the kernel as a cache. But I have no Swap used so
we're good.

So how do I get Hobbit to see that and relax (not go to Yellow) until
we start using Swap?

Frank