kcore eating my disk space

[David Gardiner <daveg@sonartech.com.au>]

what is /proc/kcore and why is it eating up my disk space?????
i.e.
262573 -r--------    1 root     root     268349440 Oct 16 08:59 kcore
and a couple of minutes later
0 -r--------    1 root     root     320598016 Oct 16 09:03 kcore
^                                                   ^
 |                                                    |
and why is it's size 0 blks and also have a size of 320598016 bytes
i'm running with kernel 2.4.17

Yeah the obvious answer from it's name is it's a kernel core dump, but 
thats just a guess! a real explanation would be good and how do I get 
rid of it would be better.
Thanks,
Dave