Humongous CACHE.DAT file

[Nuno Canas]

My cache.dat file is growing to absurd levels.
I saw doing:
%SYS>D ^%GSIZE

ROUTINE          546        3,561,036     80 %       382
SHM.PessoaD        1              244      3 %         0
SHM.PessoaI        1               92      1 %         0
SPOOL              1               12      0 %         0

ROUTINE has 3.xx Gigs !!

What can be generating this ?
How can I see ?

TIA

Nuno