entropy going yellow

Anyone has any idea on this??

 
From: David Hay Currie [mailto:user-ab244b10c769@xymon.invalid] 
Sent: Tuesday, February 16, 2010 2:04 PM
To: user-ae9b8668bcde@xymon.invalid
Subject: [hobbit] entropy going yellow

 
The entropy check on my xymon server keeps going yellow saying that the
kernel entropy pool is low. However I am not completely sure what it is
(I did look for info online) or how to fix the check so it does not go
yellow (increase the entropy? Clear it ?)

If anyone can give me a hand I would appreciate it.